<script data-pm-proxy="intercept"></script><?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0"><channel><title><![CDATA[Dr Bobby Live Long and Well]]></title><description><![CDATA[I am a physician (internal medicine), scientist (published 180 peer-reviewed publications), and Ironman Triathlete with a focus on longevity/wellness/health. My podcast: Live Long and Well With Dr. Bobby or follow me @DrBobbyLiveLongandWell ]]></description><link>https://drbobby.substack.com</link><image><url>https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png</url><title>Dr Bobby Live Long and Well</title><link>https://drbobby.substack.com</link></image><generator>Substack</generator><lastBuildDate>Thu, 03 Sep 2026 07:39:45 GMT</lastBuildDate><atom:link href="/__u/drbobby.substack.com/feed" rel="self" type="application/rss+xml"/><copyright><![CDATA[bobby dubois]]></copyright><language><![CDATA[en]]></language><webMaster><![CDATA[drbobby@substack.com]]></webMaster><itunes:owner><itunes:email><![CDATA[drbobby@substack.com]]></itunes:email><itunes:name><![CDATA[Bobby Dubois MD, PhD]]></itunes:name></itunes:owner><itunes:author><![CDATA[Bobby Dubois MD, PhD]]></itunes:author><googleplay:owner><![CDATA[drbobby@substack.com]]></googleplay:owner><googleplay:email><![CDATA[drbobby@substack.com]]></googleplay:email><googleplay:author><![CDATA[Bobby Dubois MD, PhD]]></googleplay:author><itunes:block><![CDATA[Yes]]></itunes:block><item><title><![CDATA[Breakfast: The Most Important Meal — or the Most Marketed?]]></title><description><![CDATA[I woke this morning at my usual hour, around 5 a.m., made coffee with my new barista machine, and sat down with the latest studies that had come across my desk.]]></description><link>https://drbobby.substack.com/p/breakfast-the-most-important-meal</link><guid isPermaLink="false">https://drbobby.substack.com/p/breakfast-the-most-important-meal</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Wed, 29 Jul 2026 16:45:15 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>I woke this morning at my usual hour, around 5 a.m., made coffee with my new barista machine, and sat down with the latest studies that had come across my desk. A typical morning.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>Then it was 7 o&#8217;clock &#8212; time to exercise. And here was the question: I wasn&#8217;t hungry. Coffee tends to blunt my appetite for a while. So should I eat breakfast before working out? Is coffee enough? And on mornings I&#8217;m <em>not</em> exercising, should I eat breakfast anyway?</p><p>We&#8217;ve all heard it: <em>breakfast is the most important meal of the day.</em> But is it? Where did that idea come from &#8212; science, tradition, or marketing?</p><p>Gail and I have a line we use several times a day: &#8220;Inquiring minds want to know.&#8221;</p><h3>First, a better question</h3><p>Here&#8217;s the problem I hit immediately. We can&#8217;t answer &#8220;is breakfast the most important meal&#8221; until we answer: <strong>most important for </strong><em><strong>what</strong></em><strong>?</strong></p><p>Does breakfast uniquely help you lose weight? Give you energy to exercise? Keep you sharp at 10 a.m.? Get enough protein? Connect with people you love? A meal could be the champion of one and irrelevant to another.</p><p>So before I looked at a single study, I built a scoreboard &#8212; three questions:</p><ol><li><p><strong>Does breakfast change my body and health?</strong> (weight, blood sugar, disease risk, protein)</p></li><li><p><strong>Does it help me perform today?</strong> (energy to exercise, mental sharpness)</p></li><li><p><strong>Does it help me live well?</strong> (connection, family rhythm)</p></li></ol><p>Two more considerations ride alongside: <strong>for whom</strong> &#8212; a hungry child, an endurance athlete, and an older adult chasing protein get different verdicts from the same meal &#8212; and <strong>compared to what?</strong> Skipping? A bigger lunch? Just coffee?</p><h3>Where the slogan came from</h3><p>&#8220;Breakfast is the most important meal&#8221; didn&#8217;t come from a medical breakthrough. It began at Dr. John Harvey Kellogg&#8217;s <a href="https://www.britannica.com/biography/John-Harvey-Kellogg">Battle Creek Sanitarium</a> in Michigan &#8212; part spa, part hospital, part hotel. Kellogg may have been America&#8217;s first longevity guru; his gospel was &#8220;biologic living&#8221;: vegetarian, no alcohol, no coffee, lots of exercise.</p><p>Cereal itself was an accident. In the 1890s, cooked wheat left out overnight <a href="https://www.history.com/articles/cereal-breakfast-origins-kellogg">flaked when rolled</a> &#8212; the first ready-to-eat flaked cereal. His brother W.K. saw the business in it, added sugar and salt over the doctor&#8217;s objections, and launched the company in 1906. A former patient, C.W. Post, copied the idea into Grape-Nuts.</p><p>The phrase itself came from dietitian Lenna Cooper, mentored by Kellogg, who <a href="https://www.huffpost.com/entry/breakfast-most-important-history_n_5910054">wrote in his </a><em><a href="https://www.huffpost.com/entry/breakfast-most-important-history_n_5910054">Good Health</a></em><a href="https://www.huffpost.com/entry/breakfast-most-important-history_n_5910054"> magazine in 1917</a> that breakfast &#8220;is the most important meal of the day, because it is the meal that gets the day started.&#8221; A reasonable health idea &#8212; which became a business.</p><p>Then in the 1920s, Edward Bernays &#8212; the father of public relations, and Freud&#8217;s nephew &#8212; was hired by Beech-Nut, whose key product then was bacon. Americans ate light: coffee and a roll. Bernays surveyed 5,000 physicians on whether a heartier breakfast was better. About 4,500 agreed. The result: &#8220;doctor-recommended&#8221; bacon and eggs.</p><p>But marketed doesn&#8217;t mean wrong. So let&#8217;s score it.</p><h3>Question 1: Does breakfast change your body?</h3><p>The strongest-sounding argument is observational, and it&#8217;s dramatic. In a <a href="https://pubmed.ncbi.nlm.nih.gov/31023424/">nationally representative U.S. study</a> of 6,550 adults followed 17 to 23 years, people who never ate breakfast had an <strong>87% higher risk of dying from cardiovascular disease</strong> than daily breakfast eaters &#8212; even after adjusting for diet quality, lifestyle, BMI, and cardiac risk factors.</p><p>Case closed? Not quite. Breakfast skippers also tend to sleep less, smoke more, drink more, work irregular shifts, and eat late at night. People who do healthy things tend to do <em>many</em> healthy things. Skipping breakfast may be less a cause of illness than a marker of a more chaotic life. And in that same study, the rise in <em>overall</em> mortality wasn&#8217;t statistically significant.</p><p>So what happens when we randomize people? Conventional wisdom says eat breakfast to lose weight. But if breakfast adds calories without reducing them later, why would we expect that? A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6352874/">BMJ meta-analysis</a> found adding breakfast didn&#8217;t help weight loss at all &#8212; breakfast eaters consumed <em>more</em> total daily calories, and skippers ended up slightly lighter. In reverse, same answer: a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7304383/">meta-analysis of seven trials</a> found <em>skipping</em> breakfast produced about a pound of weight loss over two months. (Though skipping may nudge LDL cholesterol up &#8212; nothing is free.)</p><p>Breakfast&#8217;s best argument is <em>timing</em>. Insulin sensitivity is generally better earlier in the day, so the same food may be handled differently at 8 a.m. than at 10 p.m. In one <a href="https://www.cell.com/cell-metabolism/fulltext/S1550-4131(18)30253-5">well-controlled trial</a>, men with prediabetes who ate all their food before 3 p.m. improved insulin sensitivity and blood pressure &#8212; <em>without losing weight</em>. Timing itself mattered. Other front-loading trials show modest extra weight loss, but the evidence is low-certainty. My honest read: the theory is elegant; the trials leave me uncertain. The villain may not be skipping breakfast &#8212; it may be saving calories for late at night.</p><p>One practical point: protein. If you need 90 grams a day, that&#8217;s harder if your first real meal is at noon.</p><p><strong>Verdict:</strong> breakfast doesn&#8217;t change your body directly. Any effect runs through whether it helps you eat better across the whole day.</p><h3>Question 2: Does breakfast help you perform?</h3><p>For exercise, it depends on the job. A <a href="https://onlinelibrary.wiley.com/doi/abs/10.1111/sms.13054">meta-analysis of 46 studies</a> found eating beforehand improved <em>prolonged</em> aerobic performance &#8212; but not shorter sessions. For an easy 20&#8211;45 minutes, coffee and water are usually fine. For something long or hard, fuel matters. Caffeine improves performance, but caffeine is not fuel.</p><p>For the mind, the picture splits by <em>whom</em>. In children, a <a href="https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2013.00425/full">review of 36 studies</a> found mostly positive effects on classroom behavior, with the clearest academic gains in undernourished kids. It&#8217;s hard to focus on fractions when you&#8217;re waiting for lunch. But in healthy adults, a <a href="https://pubmed.ncbi.nlm.nih.gov/27184286/">review</a> found only a small benefit for memory &#8212; and essentially nothing for attention or executive function.</p><h3>Question 3: Does breakfast help you live well?</h3><p>Food isn&#8217;t just fuel. The <a href="https://www.worldhappiness.report/ed/2025/sharing-meals-with-others-how-sharing-meals-supports-happiness-and-social-connections/">World Happiness Report 2025</a>, using Gallup data from 142 countries, found that how often you share meals predicts wellbeing and loneliness about as strongly as income does. Roughly one in four Americans now eats every meal alone.</p><p>But that&#8217;s about <em>shared</em> meals &#8212; and for most of us, that meal is dinner. Dinner asks, <em>how was your day?</em> Breakfast asks, <em>what&#8217;s ahead &#8212; are you ready?</em></p><h3>Three questions, three different winners</h3><p>Breakfast wins if your goal is earlier protein, circadian-friendly timing, fueling a hard morning workout, or a child&#8217;s readiness to learn. Lunch wins if your goal is afternoon focus and not arriving at dinner ravenous. Dinner wins if your goal is connection.</p><p>There is no single most important meal for everyone.</p><p>Here&#8217;s where I land. For me, breakfast is <em>not</em> the most important meal &#8212; but that&#8217;s not the same as &#8220;skip breakfast.&#8221; It depends on what the day asks of me. If I have a two-hour bike ride or run ahead, I eat; coffee alone won&#8217;t finish that workout. If I&#8217;m just writing and reading, coffee is enough. If I&#8217;m eating with friends or family, breakfast jumps to the top &#8212; the eggs are beside the point; the table is the point. And if nothing is pushing me toward breakfast, I skip it and save the calories until I&#8217;m genuinely hungry &#8212; though children, adolescents, pregnant women, and diabetics should be more cautious about skipping.</p><p>Maybe breakfast isn&#8217;t the most important meal of the day. Maybe it&#8217;s the most <em>marketed</em>. The most important meal is the one that helps you live the day you&#8217;re actually trying to live.</p><p>So &#8212; what do you think? For you, is breakfast the most important meal of the day?</p><div class="poll-embed" data-attrs="{&quot;id&quot;:883767}" data-component-name="PollToDOM"></div><p></p><p></p><div class="subscription-widget-wrap-editor" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe&quot;,&quot;language&quot;:&quot;en&quot;}" data-component-name="SubscribeWidgetToDOM"><div class="subscription-widget show-subscribe"><div class="preamble"><p class="cta-caption">Thanks for reading Dr Bobby Live Long and Well! Subscribe for free to receive new posts and support my work.</p></div><form class="subscription-widget-subscribe"><input type="email" class="email-input" name="email" placeholder="Type your email&#8230;" tabindex="-1"><input type="submit" class="button primary" value="Subscribe"><div class="fake-input-wrapper"><div class="fake-input"></div><div class="fake-button"></div></div></form></div></div><p></p>]]></content:encoded></item><item><title><![CDATA[No Pain, No Gain — or Time to Maintain?]]></title><description><![CDATA[A few weeks ago I was in the middle of a hard set with my strength trainer &#8212; muscles burning, breath short &#8212; when a somewhat embarrassing thought (for a wellness aficionado) floated through my head: This isn&#8217;t fun.]]></description><link>https://drbobby.substack.com/p/no-pain-no-gain-or-time-to-maintain</link><guid isPermaLink="false">https://drbobby.substack.com/p/no-pain-no-gain-or-time-to-maintain</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Fri, 17 Jul 2026 11:45:01 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/207415066/c7388f522399caf8c313916352043bfd.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p><span>A few weeks ago I was in the middle of a hard set with my strength trainer &#8212; muscles burning, breath short &#8212; when a somewhat embarrassing thought (for a wellness aficionado) floated through my head: </span><em><span>This isn&#8217;t fun. Should I just quit?</span></em></p><p><span>I didn&#8217;t quit that set. But the thought stuck with me, because it pointed at something the famous slogan gets wrong. We all grew up with </span><em><span>no pain, no gain</span></em><span>, and it isn&#8217;t entirely false &#8212; muscles do need challenge, runners do need harder efforts to get faster, and sometimes we have to sit in a little discomfort to grow. But the slogan hides a danger nobody warns you about. And it isn&#8217;t the pain.</span></p><p><a href="https://drbobbylivelongandwell.com/prescriptions"><span data-color="#00ffff" style="color: rgb(0, 255, 255);">Sign up to get my 1-page action guide for this and other articles: Dr. Bobby&#8217;s 1-page Prescriptions</span></a></p><p><strong><span>Every health habit charges a tax</span></strong></p><p><span>Every healthy habit charges a tax. Strength training is paid for in soreness and a little dread. Running costs you the effort of getting out the door. Eating well costs planning and the occasional pang of hunger. The tax isn&#8217;t bad &#8212; often it&#8217;s exactly the price of getting better. But when the tax climbs too high, people don&#8217;t gently dial it back. They stop paying it altogether. They cancel the membership, abandon the plan, and walk away from the whole thing. And the moment you quit the habit, every bit of benefit you were chasing disappears with it.</span></p><p><span>That&#8217;s the quitting I worry about &#8212; not stopping a set a few reps early, which is often the smart move, but giving up the habit for good. Which is why I&#8217;ve come to think the real problem in </span><em><span>no pain, no gain</span></em><span> isn&#8217;t the word </span><em><span>pain</span></em><span>. It&#8217;s the word </span><em><span>gain</span></em><span> &#8212; the quiet assumption that more is always the goal. More weight, more speed, more discipline, more optimization, forever.</span></p><p><strong><span>More, More, More isn&#8217;t necessary</span></strong></p><p><span>What surprised me, when I went back to the research, is how clearly the science doesn&#8217;t support more, more, more. For the parts of health we can actually measure, the benefit doesn&#8217;t climb in a straight line &#8212; it rises fast and then flattens. When researchers pooled the studies on strength training and living longer, the biggest drop in mortality showed up at </span><a href="https://pubmed.ncbi.nlm.nih.gov/35228201/"><span>about 30 to 60 minutes of strength work per week</span></a><span> &#8212; not per day &#8212; with little added benefit beyond an hour. Running tells the same story: </span><a href="https://www.jacc.org/doi/10.1016/j.jacc.2014.04.058"><span>as little as five to ten minutes a day of easy running</span></a><span> was linked to roughly 30% lower mortality and about three extra years of life, and the people who ran far more didn&#8217;t gain dramatically more protection. Zoom out to physical activity in general and the benefit </span><a href="https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2212267"><span>plateaus well before the extremes</span></a><span>. Past a point, &#8220;more&#8221; mostly just raises the tax not the benefits (very much).</span></p><p><span>So if more isn&#8217;t always the answer, what is? I think it comes down to two questions you can ask about any part of your health.</span></p><p><strong><span>Question 1: Which season am I in?</span></strong></p><p><span>Start by asking: </span><em><span>Am I in a season of growth, or a season of maintenance?</span></em><span> Am I genuinely still short of where I need to be &#8212; in which case a higher tax is worth paying &#8212; or have I already arrived, so my real job now is to </span><em><span>preserve</span></em><span> what I built, at the lowest tax that holds the gain? This is where a lot of well-meaning advice quietly goes sideways. Coaches often tell you to start small, then add another habit, then another as your confidence grows. That&#8217;s genuinely good advice for getting started &#8212; but notice </span><em><span>it has no finish line</span></em><span>. &#8220;Always add the next thing&#8221; is </span><em><span>no pain, no gain</span></em><span> in friendlier clothing.</span></p><p><span>I watch this play out at home. My wife Gail uses an approach called Bright Line Eating &#8212; clear, firm boundaries around food. In her growth season, those bright lines were exactly what helped her lose the weight; the structure was the point. But she never treated the strictest version as a life sentence. Once she arrived, she shifted into a maintenance season &#8212; eating more, and more diversely, in a way she can actually sustain for the long haul. Same person, two seasons, two very different taxes. And the research is encouraging here: among people who keep weight off long-term, maintenance often </span><a href="https://pubmed.ncbi.nlm.nih.gov/11011910/"><span>becomes easier over time</span></a><span>, not harder.</span></p><p><strong><span>Question 2: Will I know when I&#8217;ve arrived?</span></strong></p><p><span>Which raises the obvious problem buried in that first question: </span><em><span>how will I actually know when I&#8217;ve arrived?</span></em><span> Kids are wonderful at this. Every parent knows the sound from the back seat &#8212; </span><em><span>are we there yet?</span></em><span> It&#8217;s annoying, but it&#8217;s also wise, because a child has a crystal-clear sense of arriving. The car stops, and you&#8217;re </span><em><span>there.</span></em><span> Most of our health goals have no such destination &#8212; just an odometer that never stops. &#8220;Lose weight.&#8221; &#8220;Sleep more.&#8221; &#8220;Get stronger.&#8221; What is the endpoint? There isn&#8217;t one&#8230;</span></p><p><span>So I&#8217;d trade these goals for ones you&#8217;ll recognize when you arrive. For strength: </span><em><span>Can I get up off the floor without using my hands? Can I stand on one leg long enough to pull on my socks?</span></em></p><p><span>For sleep: </span><em><span>Do I wake up refreshed, without that afternoon wall of sleepiness?</span></em><span> Instead of a number on the scale: </span><em><span>Have I lost enough that my blood sugar is out of the pre-diabetic range?</span></em><span> And here&#8217;s the part I love &#8212; these aren&#8217;t the soft option. The simple ability to </span><a href="https://pubmed.ncbi.nlm.nih.gov/23242910/"><span>rise from the floor</span></a><span> and to </span><a href="https://pubmed.ncbi.nlm.nih.gov/35728834/"><span>balance on one leg for ten seconds</span></a><span> are each associated with survival in older adults. These are observational studies, so practicing the test won&#8217;t by itself buy you years &#8212; but they tell us these everyday capacities are worth aiming at. A functional goal isn&#8217;t lowering the bar. It&#8217;s aiming at the thing that actually counts, and one you&#8217;ll know you&#8217;ve hit.</span></p><p><strong><span>No Pain, No Gain Can Be Our Parking Brake</span></strong></p><p><span>If any of this sounds familiar, it&#8217;s because it&#8217;s a cousin of something I&#8217;ve written about before &#8212; perfectionism, what I&#8217;ve called the &#8220;parking brake&#8221;. Drive with it engaged and the whole trip is slower, hotter, and less enjoyable, until one day you just don&#8217;t want to drive at all.</span></p><p><span>Voltaire put it more elegantly: the best is the enemy of the good. Perfectionism whispers </span><em><span>not good enough yet</span></em><span>; </span><em><span>no pain, no gain</span></em><span> whispers </span><em><span>always more.</span></em><span> Same brake. Both drain the joy out of the very habits that are supposed to help us &#8212; and joyless is exactly when we abandon. It&#8217;s no accident that when researchers ask why people stick with exercise, </span><a href="https://pubmed.ncbi.nlm.nih.gov/22726453/"><span>enjoyment and self-chosen motivation</span></a><span> keep predicting who keeps going.</span></p><p><strong><span>A marathon, not a sprint</span></strong></p><p><span>Health is a marathon, not a sprint &#8212; something you want to be doing not for eight weeks, but for the next thirty years. Growth has its season, and so does maintenance. Maintenance isn&#8217;t quitting; it&#8217;s quit prevention.</span></p><p><span>So here&#8217;s my question for you, borrowed from the back seat: in the part of your health you care about most, are you actually still growing &#8212; or have you already arrived, and just haven&#8217;t let yourself say </span><em><span>we&#8217;re there?</span></em></p>]]></content:encoded></item><item><title><![CDATA[What Should You Actually Worry About?]]></title><description><![CDATA[A Framework for Sorting Health Fears from Health Facts]]></description><link>https://drbobby.substack.com/p/what-should-you-actually-worry-about</link><guid isPermaLink="false">https://drbobby.substack.com/p/what-should-you-actually-worry-about</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Mon, 06 Jul 2026 16:32:15 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/205584472/1f843b28a2c1f34df8c644afcc070f09.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Every week, it seems, there&#8217;s a new health alarm to add to the pile. Artificial sweeteners will kill you. Seed oils are toxic. Microplastics are invading your organs. You need to optimize your microbiome, test your biological age, and take seventeen supplements before breakfast.</p><p>If you&#8217;ve ever felt exhausted by all of it &#8212; welcome to the club.</p><p>I&#8217;ve spent years reviewing the evidence behind health claims, and that process has done something unexpected: it hasn&#8217;t given me more things to worry about. It&#8217;s given me permission to worry about fewer of them. And just as importantly, it&#8217;s helped me understand which ones deserve real attention.</p><p>So today I want to share not just my personal worry list, but the framework behind it. Because the goal isn&#8217;t for you to adopt my worries. It&#8217;s to help you build your own &#8212; grounded in evidence rather than headlines.</p><p></p><p><a href="https://drbobbylivelongandwell.com/prescriptions"><span data-color="#ffff00" style="color: rgb(255, 255, 0);">Want a 1-page action item summary for each article:  Sign-up Here</span></a></p><h2>What &#8220;Evidence-Grounded Worry&#8221; Actually Means</h2><p>Most health anxiety comes from two places: the news and our neighbor&#8217;s advice. Neither is a reliable guide. Headlines are designed to alarm. Anecdotes, however well-meaning, are just one person&#8217;s experience.</p><p>An evidence-grounded worry is different. It asks: </p><ul><li><p>Is this concern common? </p></li><li><p>Is the risk meaningful? </p></li><li><p>Can I actually do something about it? </p></li></ul><p>If the answer to those three questions is yes, it earns a place on my list. If not, it doesn&#8217;t &#8212; no matter how scary it sounds in a podcast or on a wellness website.</p><p>The goal isn&#8217;t to worry more. It&#8217;s to worry better.</p><h2>What I Do Worry About</h2><p><strong><span>Brain and Heart Health</span></strong></p><p>These two earn the top spot, and for good reason: they share many of the same risk factors and together account for enormous suffering and early death. Blood pressure, cholesterol, blood sugar, sleep, physical activity, smoking, weight, and social connection all influence both your cardiovascular and cognitive future.</p><p>The <a href="https://www.thelancet.com/article/S0140-6736(24)01296-0/abstract">2024 Lancet Commission on dementia</a> identified 14 modifiable risk factors and estimated that addressing them could prevent or delay roughly 45 percent of dementia cases worldwide. That&#8217;s not a personal guarantee &#8212; population statistics don&#8217;t translate neatly to individual outcomes &#8212; but it&#8217;s a compelling signal that the levers are real and worth using.</p><p>Do you know your blood pressure? Your cholesterol? Your blood sugar? Your family history? These aren&#8217;t things to panic about, but they are things to know &#8212; and to discuss with your doctor if something is moving in the wrong direction.</p><p><strong><span>Injury</span></strong></p><p>This one surprises people, but it shouldn&#8217;t. One bad fall, torn tendon, or back injury can sideline you for months &#8212; and as we age, the cost of that interruption compounds. We lose aerobic fitness and muscle mass faster than we expect, and regaining them takes longer and longer, often starting in our late thirties.</p><p>So I think about injury prevention seriously: strength work, balance training, adequate recovery time, and occasionally choosing the safer version of an activity. That doesn&#8217;t mean living in bubble wrap. It means recognizing that the best training program in the world is useless if you&#8217;re injured and can&#8217;t do it.</p><p><strong><span>Social Connection</span></strong></p><p>This one can sneak up on you. A friend moves away. A parent declines. Your social circle quietly contracts without anyone making a deliberate decision. The evidence that social connection influences both quality and length of life is substantial &#8212; and yet it&#8217;s the health factor most of us spend the least time actively tending.</p><p>For me, this means making the phone call. Scheduling the coffee. Not leaving relationships entirely to chance. Connection isn&#8217;t automatic. It requires maintenance.</p><p><strong><span>Microplastics &#8212; With Proportion</span></strong></p><p>Microplastics are <a href="https://podcasts.apple.com/au/podcast/57-microplastics-potential-problem-with-no-easy-solution/id1744023328?i=1000740833828">showing up</a> in places they shouldn&#8217;t: blood, arteries, organs, placentas, even the brain. That&#8217;s genuinely concerning. But they&#8217;re also essentially everywhere &#8212; in the air, our food, our clothing, our water &#8212; which makes total elimination impossible.</p><p>My approach here is to reduce exposure where it&#8217;s easy and sustainable. I stopped storing food in plastic containers. I switched to wooden cutting boards. I don&#8217;t microwave food in plastic. None of that solves the problem. But these are practical, low-effort steps I can actually sustain without turning my life into a health anxiety project.</p><h2>What I Don&#8217;t Worry Much About</h2><p>This is the part many people find surprising &#8212; and maybe more useful.</p><p><strong>Artificial Sweeteners</strong></p><p>The headlines on this one have been alarming, but the <a href="https://podcasts.apple.com/us/podcast/diet-soda-twinkies-and-the-questions-that-matter/id1744023328?i=1000768899635">actual evidence</a> is far less frightening than the coverage suggests. An occasional diet soda is not a meaningful health threat for most people. If it helps you cut calories elsewhere, there&#8217;s a reasonable case it&#8217;s actually beneficial.</p><p><strong>Bacon and Processed Meat</strong></p><p>Yes, eating pounds of processed meat every day is probably not ideal. But <a href="https://drbobbylivelongandwell.com/2025/06/17/do-i-really-need-to-give-up-bacon-to-live-long-and-well/">eating bacon with breakfast a few times a week is a very different story</a>. This is where the concept of dose matters enormously. People hear that something carries risk and assume all exposures are equivalent. They&#8217;re not. Quantity and frequency change the picture dramatically.</p><p><strong>Occasional Ultra-Processed Foods</strong></p><p><a href="https://drbobbylivelongandwell.com/2025/10/28/ultra-processed-foods-the-real-problem-isnt-what-you-think/">My concern with ultra-processed food is mainly about weight</a> &#8212; eating a lot of it tends to make it easy to consume more calories than you need. But eating Oreos at a party is not a crisis. The question isn&#8217;t whether you ever eat ultra-processed food. It&#8217;s whether ultra-processed food has become your dietary foundation. There&#8217;s a meaningful difference.</p><p><strong>Organic vs. Conventional Produce</strong></p><p>I don&#8217;t think the <a href="https://podcasts.apple.com/us/podcast/47-do-organics-really-make-you-healthier-or-just-poorer/id1744023328?i=1000723871204">evidence</a> supports the idea that eating exclusively organic is necessary for long-term health. If you enjoy it, can afford it, and it motivates you to eat more vegetables &#8212; great. But people spending thousands of dollars a year on organic groceries while skipping produce they can afford is a poor trade. The bigger question is whether you&#8217;re eating enough fruits and vegetables of any kind.</p><p><strong>Seed Oils</strong></p><p>These have developed a reputation that far outpaces the evidence. Many foods that contain seed oils are also ultra-processed, calorie-dense, and easy to overeat &#8212; but that&#8217;s not the same as saying the seed oil is the culprit. The fear around seed oils has grown larger than the <a href="https://www.sensible-med.com/p/seed-oils-real-harm-or-just-another">science</a> warrants.</p><p><strong>The Eight Glasses of Water Rule</strong></p><p>This is a health <a href="https://podcasts.apple.com/us/podcast/14-eight-glasses-of-water-a-day-important-guidance/id1744023328?i=1000666636753&amp;l=ko">myth</a> that refuses to die. Hydration matters, of course &#8212; but the &#8220;eight glasses a day&#8221; figure has no meaningful scientific basis. Your brain has a thirst mechanism. Your kidneys regulate fluid balance. Trust them.</p><p><strong>Most Supplements</strong></p><p>I&#8217;m not anti-supplement. I&#8217;m pro-evidence. Some supplements make sense in specific circumstances &#8212; vitamin D if blood tests show a deficiency, for example. But the supplement industry has built an empire on the promise of benefits that rigorous evidence rarely confirms. Before taking anything, ask: Is there a real reason I need this? Is there actual evidence in humans? Is the benefit meaningful? Is it safe? Is it worth the cost? For most popular supplements, the honest answer is no on at least several of those counts.</p><p><strong>Every Longevity Trend</strong></p><p>Biological age testing. NAD boosters. Total body scans for asymptomatic people. Personalized microbiome protocols. Some of these may eventually prove useful. But right now, we&#8217;re mostly paying for the promise of science that hasn&#8217;t yet arrived. Chasing every new longevity trend is an expensive way to feel proactive without necessarily doing much that matters.</p><h2>The Three-Bucket Framework</h2><p>Here&#8217;s a practical way to sort your own health concerns:</p><p><strong><span>Bucket One: Real Attention. </span></strong>Things that are common, where evidence shows the stakes are high, and where you can actually do something. For most people, this means blood pressure, physical activity, sleep quality, blood sugar, smoking, and social connection. These are unglamorous. They don&#8217;t generate much social media content. But they&#8217;re where the evidence is strongest and the payoff is greatest.</p><p><strong><span>Bucket Two: Proportion, Not Panic. </span></strong>Things that carry some risk but where the absolute magnitude is modest, especially at reasonable doses or frequencies. Occasional processed food, a diet soda, non-organic produce &#8212; these belong here for most people. Stay mindful, but don&#8217;t assign them the same emotional weight as a smoking habit or untreated hypertension.</p><p><strong><span>Bucket Three: Noise. </span></strong>The longevity trend of the month. The supplement your colleague swears by. The food fear that multiplied across social media faster than any peer-reviewed journal could keep up. Not everything in this bucket is worthless forever &#8212; but it doesn&#8217;t deserve your attention or your money until the evidence catches up.</p><p><em><span>&#8220;Worry isn&#8217;t the enemy. Misdirected worry is.&#8221;</span></em></p><p>When we treat every health concern as equally urgent, we spend our limited time, money, and attention on the wrong things. We obsess over seed oils while ignoring blood pressure. We buy expensive supplements while skipping the gym. We stress about organic labels while our closest friendships quietly wither.</p><p>The evidence can help &#8212; not just by telling us what to do, but by telling us what we can stop worrying about. That second function might be the more valuable one.</p><p>What&#8217;s on your real worry list? And what might you finally be ready to let go?</p><p><em><span>Dr. Bobby (Robert W. DuBois, MD, PhD) is the host of </span><strong><a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328"><span>Live Long and Well With Dr. Bobby</span></a></strong><span>, a podcast dedicated to evidence-based health and longevity</span></em></p>]]></content:encoded></item><item><title><![CDATA[The Health Plan I Actually Follow — and Why]]></title><description><![CDATA[I&#8217;m turning 70 in July.]]></description><link>https://drbobby.substack.com/p/the-health-plan-i-actually-follow</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-health-plan-i-actually-follow</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 30 Jun 2026 16:17:36 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/204298698/927b4d95d1f20547f1c3dca340fa0791.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p><span>I&#8217;m turning 70 in July. That number feels different. Not bad. Not a tragedy. But different &#8212; like a threshold I&#8217;ve been approaching without fully acknowledging.</span></p><p><span>So, I&#8217;ve been asking myself some honest questions:</span></p><p><span>&#183; What am I actually doing to preserve the life I want?</span></p><p><span>&#183; What am I not doing?</span></p><p><span>&#183; What do I worry about?</span></p><p><span>&#183; And what have I decided to let go?</span></p><p><span>Maybe you&#8217;ve had a moment like that. A milestone birthday. A health scare. Or just a quiet evening where you realized you want to be more intentional about how you&#8217;re living. That&#8217;s what led me to write this.</span></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p><span>I want to share my actual health plan &#8212; not as a template you should copy, but as a case study in how you might think through this topic. I have my own genetics, preferences, risks, and limitations. You have yours. But sometimes it helps to see how someone who has spent decades reviewing health evidence actually lives.</span></p><p><span>After two years of </span><a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328"><span>podcast episodes/</span></a><span>Substacks examining what does and doesn&#8217;t work, I&#8217;ve come to organize my thinking around three categories:</span></p><p><span>1. What I can influence directly?,</span></p><p><span>2. Where I need support from others?, and</span></p><p><span>3. Where medication is the right tool?</span></p><p><span>The mix differs for everyone. But most of us have something in all three buckets.</span></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/the-health-plan-i-actually-follow/comments&quot;,&quot;text&quot;:&quot;Leave a comment&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/the-health-plan-i-actually-follow/comments"><span>Leave a comment</span></a></p><div><hr></div><p><strong><span>I. What I Can Influence Directly</span></strong></p><p><strong><span>Aerobic exercise</span></strong><span> is the easy one for me. I genuinely enjoy it. I like endurance training, being outside, feeling that my body can still do something hard. I&#8217;ve completed four full Ironman triathlons and about 20 half-Ironman races, and I&#8217;m still at it as I turn 70. I don&#8217;t need extra discipline here &#8212; it fits my life because it fits my personality.</span></p><p><span>The evidence is unambiguous: aerobic exercise lowers the risk of heart disease, reduces overall mortality, and helps us keep doing what we love as we age. When something is both evidence-supported and enjoyable, you hold onto it.</span></p><p><strong><span>Sleep</span></strong><span> is entirely different. Unlike exercise, sleep doesn&#8217;t come naturally to me &#8212; at least not in the right amounts. Here&#8217;s my particular challenge: I wake up at 5 a.m. every single morning, no matter when I went to bed. My brain has no interest in compensating for a late night. I&#8217;ve accepted that this is simply how I&#8217;m made.</span></p><p><span>So if I need seven and a half to eight hours &#8212; and the evidence says I do &#8212; the morning can&#8217;t save me. I have to protect my bedtime. That means making an active, sometimes difficult choice every evening to wind down and be in bed around 9 p.m. It means leaving parties early. It means turning off things I&#8217;m enjoying. The evidence tells me sleep matters; knowing myself tells me exactly where the effort has to go.</span></p><p><strong><span>Alcohol</span></strong><span> required some honest accounting. I like wine. I really enjoy whiskey. But I&#8217;ve learned &#8212; from my own experience and from the evidence &#8212; that alcohol disrupts my sleep and affects how I feel the next morning. And the research on alcohol and dementia risk gave me another reason to pay attention.</span></p><p><span>Where I landed: once or twice a week works for me. More than that doesn&#8217;t. Weeks when I don&#8217;t drink at all, I sleep better and wake up more energized. That&#8217;s the data from my own life, and I&#8217;ve chosen to act on it.</span></p><p><strong><span>Food, weight, and protein</span></strong><span> are pretty straightforward in my approach. I&#8217;m not a nutrition obsessive. I don&#8217;t chase the perfect diet. I try to maintain a healthy weight, eat a reasonably balanced diet, and get enough protein. What it requires is honesty &#8212; which is harder than it sounds. It&#8217;s easy to tell yourself &#8220;I&#8217;m eating pretty well&#8221; or &#8220;this is just temporary.&#8221; Sometimes that&#8217;s true. Sometimes it&#8217;s a story. Know thyself &#8212; as Socrates would say &#8212; means being willing to tell the difference.</span></p><p><strong><span>Avoiding injury</span></strong><span> has become a genuine priority. When you&#8217;re younger, you can sometimes push through aches and tweaks and get away with it. As you get older &#8212; and I&#8217;d put that threshold somewhere around 40 &#8212; a significant injury can stop your exercise routine entirely, and the fitness you lose becomes increasingly hard to regain. So I think about recovery. I think about not letting ego push me into an accident. The goal isn&#8217;t to prove I can still suffer. The goal is to stay in the game.</span></p><p><strong><span>N-of-1 testing</span></strong><span> is my approach to paying attention to what actually happens in my own body when I try something. The evidence on magnesium for muscle cramps, for example, is imperfect. But in the summer heat, training hard and sweating, I&#8217;ve found it useful enough to keep taking. My own experience is data &#8212; not perfect data, but real data worth taking seriously.</span></p><div><hr></div><p><strong><span>II. Where I Need Support from Others</span></strong></p><p><span>This category is a little humbling, because it requires admitting that knowing what matters isn&#8217;t the same as actually doing it.</span></p><p><span>I&#8217;ve spent my career reviewing evidence. I understand study design. I know perfectly well why strength training matters &#8212; it helps with balance, reduces injury risk, and supports functional capacity as we age. And knowing all that wasn&#8217;t enough to make me do it.</span></p><p><span>As I said, aerobic exercise comes naturally to me. Strength training does not. I find it boring. I find it painful. And, I find reasons to skip it. Left to my own devices, it doesn&#8217;t happen.</span></p><p><span>So I hired a trainer. Nina shows up at my front door. I can&#8217;t send her away. And I already paid, which provides its own powerful incentive. Problem solved &#8212; not through willpower, but through structure.</span></p><p><span>The lesson I take from this isn&#8217;t &#8220;everyone needs a trainer.&#8221; It&#8217;s that sometimes the most realistic move isn&#8217;t to demand more discipline from yourself. It&#8217;s to build the conditions that make the desired behavior more likely.</span></p><p><span>The same principle applies to emotional health. I dealt with a fear pattern around exercise for decades, and I tried to solve it on my own &#8212; through meditation, through reflection, through sheer willpower. It didn&#8217;t work. Eventually I sought EMDR therapy, and it helped in ways that years of solo effort hadn&#8217;t. Getting help wasn&#8217;t a failure. It was what actually worked.</span></p><p><span>Where do you need support from others? Is there something you already know matters, but you can&#8217;t seem to make it happen alone? That gap between knowing and doing is real. Support is often what bridges it.</span></p><div><hr></div><p><strong><span>III. Where Medication Is the Right Tool</span></strong></p><p><span>In some wellness circles, medication is treated almost as a moral failure &#8212; as if the goal of healthy living is to optimize yourself to the point where you never need a prescription. I find this view both wrong and harmful.</span></p><p><span>Medication can be one of the most appropriate, evidence-based interventions we have. As a physician, it&#8217;s one of the primary ways I help people.</span></p><p><span>I take medications for high blood pressure, high cholesterol, and blood sugar. I have all three conditions. I&#8217;ve also taken Wellbutrin for decades &#8212; it resolved a persistent low-grade depression that affected my quality of life for years. These aren&#8217;t failures. They&#8217;re solutions.</span></p><p><span>The concern I have with the &#8220;optimize your way out of medication&#8221; message is that it implies that people who need medication simply haven&#8217;t tried hard enough. For many people, that&#8217;s simply not true. It hasn&#8217;t been true for me. And it&#8217;s worth asking whether it&#8217;s true for you.</span></p><p><span>The right question isn&#8217;t &#8220;Am I disciplined enough to avoid medication?&#8221; The right question is: &#8220;What problem am I trying to solve? What are my options? What are the expected benefits and harms? And what does the evidence suggest for someone with my specific situation?&#8221; Medication may or may not be the answer &#8212; but it deserves to be evaluated honestly, not avoided out of pride.</span></p><h3><strong><span>Putting It Together</span></strong></h3><p><span>My health plan doesn&#8217;t include everything. Not every supplement, not every emerging protocol, not every study that crosses my feed. It includes the things that, as best I can tell, are most likely to matter for me specifically.</span></p><p><span>In the first category &#8212; what I can influence directly &#8212; that means aerobic exercise, sleep, alcohol in moderation, honest attention to food and weight, injury prevention, and self-experimentation.</span></p><p><span>In the second category &#8212; where I need support &#8212; that means a trainer for strength work and professional help for emotional health.</span></p><p><span>In the third category &#8212; where medication is appropriate &#8212; that means treating real conditions with real tools.</span></p><p><span>That&#8217;s my mix. It&#8217;s not yours. Your genetics, your preferences, your risks, and your limitations are different. But here&#8217;s what I think does generalize:</span></p><p><strong><span>What can you influence directly?</span></strong><span> Which healthy behaviors come naturally to you, and which ones require deliberate decision-making?</span></p><p><strong><span>Where do you need support from others?</span></strong><span> Is there something you know matters but can&#8217;t seem to do alone?</span></p><p><strong><span>And where might medication be the right tool?</span></strong><span> Have you been avoiding a conversation worth having?</span></p><p><span>The goal isn&#8217;t a perfect plan. It&#8217;s a realistic, honest, evidence-informed one &#8212; built around who you actually are. And, my next post will be on what I actually worry about and what I don&#8217;t&#8230;based upon the last 75 podcast episdes/Substacks.</span></p>]]></content:encoded></item><item><title><![CDATA[Can You Still Change Your Future?]]></title><description><![CDATA[At age 69, I made a change. It got me thinking about one of the most important questions in health-will it still make a difference or is it too late &#8212; and the two mistakes almost everyone makes.]]></description><link>https://drbobby.substack.com/p/can-you-still-change-your-future</link><guid isPermaLink="false">https://drbobby.substack.com/p/can-you-still-change-your-future</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Thu, 11 Jun 2026 11:34:48 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p></p><div class="pullquote"><p><em>&#8220;Younger people think they have plenty of time. They don&#8217;t. Older people think they&#8217;ve missed their chance. They haven&#8217;t. The science says both are wrong.&#8221;</em></p><p><strong>&#8212; Dr. Bobby</strong></p></div><div class="native-video-embed" data-component-name="VideoPlaceholder" data-attrs="{&quot;mediaUploadId&quot;:&quot;c42714e2-e898-42fc-a4ab-d87ed716160e&quot;,&quot;duration&quot;:null}"></div><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>A few months ago, I started EMDR therapy.</p><p>EMDR &#8212; eye movement desensitization and reprocessing &#8212; is a technique where you recall a fearful memory while tracking a moving stimulus. Over time, it desensitizes you to that memory and the emotional response attached to it. I used it for something I&#8217;ve carried a long time: a deep, uncomfortable sense that something is wrong whenever I exercise intensely. Not normal discomfort. Something darker.</p><p>Two months in, it&#8217;s genuinely helped. Exercise is more enjoyable. I feel more confident. Would it have been better to address this 30 years ago? Probably. But was it too late at age 69?</p><p>Absolutely not.</p><p>That experience crystallized a question I hear all the time &#8212; from listeners, and honestly from myself. If we finally start exercising, get our blood pressure under control, quit smoking, or build new friendships later in life &#8212; <em>does it actually matter?</em> Or have we already missed our window?</p><p>The answer to this question fits into a five-part framework &#8212; not a checklist of things you should do, but a way of thinking about when timing matters, when it doesn&#8217;t, and what the evidence actually shows.</p><p><strong>Part one: start early, because damage accumulates silently.</strong> Some conditions injure you for years before you feel anything. High blood pressure is the clearest example. The risk isn&#8217;t just how high your reading is today &#8212; it&#8217;s the cumulative effect of elevated pressure over time on your blood vessels, heart, and kidneys. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8653578/">15-year study of 3,600 young adults</a> showed that cardiovascular risk tracked closely with how long blood pressure had been elevated, not just the peak level. Glaucoma follows the same logic &#8212; silent damage to the optic nerve, preventable if caught early. For younger readers, the message isn&#8217;t &#8220;deal with this someday.&#8221; Your arteries are keeping score right now.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/can-you-still-change-your-future?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/can-you-still-change-your-future?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><p></p><p><strong>Part two: some damage can actually be reversed.</strong> A <a href="https://acsjournals.onlinelibrary.wiley.com/doi/full/10.3322/caac.21808">review of 26 studies on smoking cessation</a> found that quitting progressively lowers lung cancer risk over decades &#8212; 10 years of not smoking beats continuing, 15 beats 10, 20 beats 15. The body repairs some of what was damaged. There&#8217;s also a <a href="https://pubmed.ncbi.nlm.nih.gov/1973470/">fascinating and frequently-cited study</a> where intensive lifestyle changes &#8212; a very low-fat vegetarian diet, exercise, stress management, and group support &#8212; actually reversed coronary artery narrowing in patients with established heart disease. I want to be careful here: the study was tiny (about 20 patients per group) and the results haven&#8217;t been replicated at scale. But the direction is remarkable. Partial reversal of heart disease through lifestyle? It appears possible.</p><p><strong>Part three: even if you can&#8217;t undo the past, you can protect the future.</strong> This is where &#8220;not too late&#8221; really shines. The <a href="https://www.niddk.nih.gov/about-niddk/research-areas/diabetes/diabetes-prevention-program-dpp">Diabetes Prevention Program</a> found that lifestyle changes reduced the risk of developing diabetes by 71% in adults over 60. Seventy-one percent. The past may be fixed &#8212; but tomorrow&#8217;s problems are not inevitable.</p><p><strong>Part four: some things can be built at any age, full stop.</strong> In a <a href="https://jamanetwork.com/journals/jama/article-abstract/382128">study of adults aged 90 to 96</a>, a resistance training program produced average strength gains of 174%. Not 10%. Not 20%. One hundred and seventy-four percent. These weren&#8217;t young athletes &#8212; these were nonagenarians. The goal isn&#8217;t becoming a bodybuilder at 93. It&#8217;s lifting a suitcase, recovering from a stumble, getting off the floor, staying independent. The science says it is never too late to start building that capacity.</p><p><strong>Part five: honest uncertainty.</strong> Some health behaviors are clearly beneficial, but whether the timing of when you start matters &#8212; we genuinely don&#8217;t know. Social connection is one of the strongest predictors of a long and healthy life, with the Harvard Study of Adult Development showing that the quality of midlife relationships strongly predicts late-life health. But if someone isolated at 70 builds new friendships then, how much does that change their long-term health trajectory? We don&#8217;t have a clean answer. Sauna use shows the same pattern &#8212; real benefits, real uncertainty about whether those benefits require a lifetime of use or whether starting at 60 delivers similar gains. My advice: if you enjoy these things, do them. Don&#8217;t wait for the perfect study. But calibrate your expectations honestly.</p><p>So where does this leave us?</p><p>Earlier is better. I don&#8217;t want to minimize that. Some damage accumulated in our 30s and 40s can&#8217;t be fully undone. But later is not too late &#8212; for almost anything on this list. And the older person&#8217;s mistake of saying &#8220;I&#8217;ve missed my chance&#8221; may actually be the more costly one, because it leads to doing nothing at all.</p><p>At 69, I tried EMDR. It worked. I didn&#8217;t start serious strength training until a few years ago &#8212; it&#8217;s made a real difference. I&#8217;m not offering my own experience as evidence. But I offer it as a reminder: the question isn&#8217;t &#8220;did I do everything right before now?&#8221; Most of us didn&#8217;t. The better question is: <em>what part of my future can I still change from here?</em></p><p>That&#8217;s the question worth sitting with.</p>]]></content:encoded></item><item><title><![CDATA[Can You Die of a Broken Heart ]]></title><description><![CDATA[What Everyday Stress Is Doing to Yours]]></description><link>https://drbobby.substack.com/p/can-you-die-of-a-broken-heart</link><guid isPermaLink="false">https://drbobby.substack.com/p/can-you-die-of-a-broken-heart</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Wed, 27 May 2026 17:02:14 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p>A few months ago, I shared that my dear wife Gail &#8212; the love of my life, my best friend and soul mate &#8212; had advanced uterine cancer. By all current testing, she now appears to be cancer free, and I am profoundly grateful. But in those early days, before we knew whether surgery would work, before we knew whether the chemo and radiation would take hold, I was in a state of genuine panic. And I remember thinking: if Gail dies, I might truly die of a broken heart.</p><p>That sounds melodramatic. But is it? I want to examine four ways emotions can touch the heart, and the last one affects nearly all of us. Can grief actually kill you? Can fear? Can a burst of rage trigger a heart attack? Those are the dramatic cases. But the more relevant question and the one with the most evidence behind it &#8212; is less overt: what does chronic, everyday stress do to our hearts over months and years?</p><h2>The Medical Reality of Broken Heart Syndrome</h2><p>Let&#8217;s start with the clearest medical example: Takotsubo syndrome, stress cardiomyopathy or broken heart syndrome. Here&#8217;s what happens. A person suffers a horrendous loss, shock, or intense acute stress. Shortly after, they develop chest pain and shortness of breath. Physicians may suspect a heart attack. But when they look for a blocked artery, they often don&#8217;t find one.</p><p>Instead, the heart&#8217;s main pumping chamber stops working correctly, ballooning into a distinctive shape &#8212; the shape of a Japanese octopus vessel called a takotsubo, which is how the condition got its name. A landmark <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa1406761">New England Journal of Medicine study of 1,750 patients</a> with Takotsubo found that mortality in these patients was comparable to those hospitalized with a conventional heart attack. Dying of a broken heart isn&#8217;t just a metaphor. It is a rare but real biological event.</p><p>There&#8217;s also striking data on bereavement itself. A large study by <a href="https://pubmed.ncbi.nlm.nih.gov/18511733/">Elwert and Christakis followed 373,000 elderly married couples</a> and found that the death of a spouse raised the survivor&#8217;s mortality risk across nearly all causes of death. A <a href="https://pubmed.ncbi.nlm.nih.gov/21858130/">meta-analysis of 15 prospective cohort studies covering over 2.2 million people</a> found a 41% increased risk of death in the first six months of widowhood, tapering to 14% thereafter &#8212; and the effect was significantly stronger for men than women. My worry about my own health, had Gail not survived, was not irrational.</p><h2>Fear, Anger, and the Vulnerable Heart</h2><p>Can you be frightened to death? Rarely, and most likely in someone with an already vulnerable heart &#8212; but yes. Fear activates the sympathetic nervous system. Adrenaline and stress hormones raise heart rate, blood pressure, vascular tone, and electrical excitability. In a vulnerable person, that surge can initiate a dangerous arrhythmia or coronary spasm.</p><p>A classic <a href="https://www.nejm.org/doi/full/10.1056/NEJM199602153340701">New England Journal study of the 1994 Northridge earthquake</a> &#8212; an event I witnessed firsthand &#8212; illustrated this vividly. On a typical day in Los Angeles, about four people die suddenly of cardiac causes. On the day of the earthquake, 24 people died. Fear as a trigger for cardiac death: likely.</p><p>Anger tells a similar story. A <a href="https://pubmed.ncbi.nlm.nih.gov/24591550/">systematic review by Mostofsky and colleagues</a> found that outbursts of anger were associated with a measurably higher risk of cardiovascular events shortly afterward. For a healthy person, the absolute risk from one angry episode is low. For someone with known heart disease and a vulnerable plaque or rhythm instability, anger may initiate an event.</p><h2></h2><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/can-you-die-of-a-broken-heart?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/can-you-die-of-a-broken-heart?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><h2>The Bigger Question: Chronic Stress</h2><p>Here&#8217;s the truth: most grief does not cause Takotsubo syndrome. Most fear or anger does not cause a heart attack. But these extreme cases illuminate something important. The same biological pathways of adrenaline surges, cortisol spikes, elevated blood pressure, sympathetic nervous system activation &#8212; don&#8217;t only fire on your worst day. They fire repeatedly, over years, for many of us.</p><p>An important<a href="https://pubmed.ncbi.nlm.nih.gov/15364186/"> Lancet study</a> compared people who had a first heart attack against those who had not, and found that work stress, home stress, financial strain, stressful life events, and a low sense of personal control were all significantly associated with increased heart attack risk. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9646240/">meta-analysis of over 600,000 people</a> found that psychological distress was associated with a 28% increased risk of a cardiovascular event.</p><p>Stress is not as powerful a cardiac risk factor as smoking, hypertension, diabetes, or elevated LDL cholesterol. But stress is common &#8212; and because it&#8217;s common, it matters for many of us. Chronic stress directly elevates heart rate, blood pressure, cortisol levels, and sympathetic nervous system tone. It also nudges us toward behaviors that compound the damage: less exercise, worse sleep, more alcohol, social withdrawal.</p><h2>The Protective Power of Connection</h2><p>Earlier I noted that losing a spouse raises the risk of death. The flip side is equally striking: having strong social relationships appears to protect us. A <a href="https://journals.plos.org/plosmedicine/article?id=10.1371%2Fjournal.pmed.1000316">meta-analysis of 148 studies by Holt-Lunstad and colleagues</a> found that people with stronger social relationships had a 50% better chance of survival compared with those with weaker ones. Loneliness, conversely, was <a href="https://pubmed.ncbi.nlm.nih.gov/27091846/">associated with increased risk of coronary heart disease and stroke</a>.</p><p>We don&#8217;t fully understand the mechanism. It may involve better self-care, medication adherence, earlier medical attention, a buffering effect of feeling known and loved, or residual confounding. But the signal is consistent and significant.</p><h2>What the Evidence Suggests We Do</h2><p>In <a href="https://drbobbylivelongandwell.com/2026/04/01/stressed-out-heres-what-works-whats-hype-and-how-to-tell-the-difference/">a prior article on stress</a>, I reviewed what the evidence actually supports for managing chronic stress. The interventions with the strongest backing: better sleep, regular exercise, breathwork, and meditation. There is also surprising evidence for music therapy and aromatherapy with lavender. What does not have strong evidence? Many of the supplements and apps aggressively marketed to calm you.</p><p>And of course, invest in your relationships. The data are clear. Social connection is not just good for the soul. It appears to be good for the heart.</p><h2>The Bottom Line</h2><p>Can you die of a broken heart? Rarely, yes. Can you be frightened to death? Rarely, yes. Can anger trigger a cardiac event? Sometimes, especially in someone already vulnerable.</p><p>But for most of us, the bigger question is not whether one terrible moment will kill us. It is whether our everyday lives are placing our heart under sustained, cumulative stress. The heart is a pump, yes. But it is a pump that operates inside a life &#8212; inside relationships, fears, grief, joy, and chronic low-grade pressure.</p><p>The extreme cases earn the headlines. But the slow, quiet weight of chronic stress, loneliness, and unmanaged anxiety is likely what will matter most for most of us.</p><p>Take care of your heart. Take care of yourself. And take care of those you love.</p><p><em>Dr. Bobby Dubois is a physician and scientist with 180+ publications on evidence-based medicine, appropriateness of care, and the value of health care interventions. He <a href="/__u/drbobby.substack.com/">writes a Substack</a> and podcasts at <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Live Long and Well With Dr. Bobby</a>.</em></p><div class="captioned-button-wrap" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/can-you-die-of-a-broken-heart?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;}" data-component-name="CaptionedButtonToDOM"><div class="preamble"><p class="cta-caption">Thanks for reading Dr Bobby Live Long and Well! This post is public so feel free to share it.</p></div><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/can-you-die-of-a-broken-heart?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/can-you-die-of-a-broken-heart?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p></div>]]></content:encoded></item><item><title><![CDATA[The Compass, the Detour, and the Parking Brake]]></title><description><![CDATA[Here's what I've actually learned about living long and well]]></description><link>https://drbobby.substack.com/p/the-compass-the-detour-and-the-parking</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-compass-the-detour-and-the-parking</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Wed, 20 May 2026 11:09:55 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p><strong>Evidence</strong> is the <em>compass</em>. <strong>Hype</strong> is the <em>detour</em>. <strong>Perfectionism</strong> is the <em>parking brake.</em></p><p>After a lifetime of studying evidence, medicine, and what actually helps people &#8212; I&#8217;ve been sitting with a question: what have I really learned? What have I been trying to share?</p><p>Not what&#8217;s trendy. Not what&#8217;s getting headlines this month. But what, after all these years, actually matters if our goal is to live long and well?</p><h2>What We Actually Want</h2><p>Most of us don&#8217;t want just a longer life. We want a <em>better</em> life &#8212; more years when we can think clearly, move well, stay independent, enjoy the people we love, and do the things that make life meaningful.</p><p>So how do we make decisions that actually support that kind of life?</p><p>For me, the answer keeps coming back to one word: evidence.</p><p>Evidence is our compass. It helps us decide which direction is most likely to help when there are so many voices telling us different things. But this compass isn&#8217;t always easy to read. Studies conflict. Headlines overstate findings. Experts disagree. And sometimes &#8212; often &#8212; what looks like evidence is really just a theory, or an anecdote, that feels like proof. How do we stay true to the evidence compass when it&#8217;s not always easy to read?</p><p>Two forces pull us off course. Hype makes weak evidence feel strong &#8212; it&#8217;s the detour. Perfectionism makes the journey exhausting even when we&#8217;re pointed in the right direction &#8212; it&#8217;s the parking brake. Something I have applied more times than I wish to admit.</p><h2>Why Evidence Matters So Much to Me</h2><p>There&#8217;s someone close to me who for years would make health claims that made my hair stand on end &#8212; when I had hair.</p><p>She&#8217;d say things like: breast cancer survivors should never eat chocolate because it will cause the cancer to recur. Or, you must eat sauerkraut to protect your microbiome. Or, never touch receipts at the grocery store because the thermal paper has chemicals that will damage your endocrine system and fertility.</p><p>And when I&#8217;d ask &#8212; what&#8217;s the evidence? &#8212; the answer was usually &#8220;I read it somewhere,&#8221; or &#8220;it was in the New York Times,&#8221; or &#8220;my friend&#8217;s cousin&#8217;s doctor told me.&#8221;</p><p>What got me upset wasn&#8217;t the claim itself. I understand that we can all get excited or frightened by something we read. What bothered me was the certainty. An almost religious conviction that what she&#8217;d heard was true and had to be acted on &#8212; completely resistant to any discussion of the actual evidence.</p><p>I have genuine sympathy for people who are suffering and looking for answers, because traditional medicine often doesn&#8217;t give them one. But I go absolutely crazy when experts try to convince those people that they have the way, when it&#8217;s almost never based on evidence.</p><p>Which is exactly why we need the compass.</p><p>My professional life has been built around that question: what does the evidence actually justify? I published more than 180 peer-reviewed articles because I wanted to separate what sounds persuasive from what is actually supported. I spent decades working inside these questions &#8212; managed care, pharmaceuticals, electronic health records, health policy. My career was largely about helping people read the compass.</p><p>Not because evidence is perfect &#8212; it isn&#8217;t. But without it, we&#8217;re much more likely to follow whichever claim sounds most convincing.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/the-compass-the-detour-and-the-parking?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/the-compass-the-detour-and-the-parking?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><p></p><h2>How to Read the Compass</h2><p>A good example of how the evidence compass works &#8212; and changes &#8212; is heart disease.</p><p>For years, we thought of stable coronary artery disease as a plumbing problem. Artery narrowed? Open it up. Sounds logical. Feels intuitively correct. Then the randomized trials came in.</p><p>In the <a href="https://pubmed.ncbi.nlm.nih.gov/17387127/">COURAGE trial</a>, patients with stable coronary disease who received angioplasty did not have fewer deaths or heart attacks than patients who received good medical therapy alone. The <a href="https://pubmed.ncbi.nlm.nih.gov/32227755/">ISCHEMIA trial</a> taught us something similar. These procedures weren&#8217;t more effective than treating the underlying risk factors aggressively.</p><p>That doesn&#8217;t mean procedures never matter &#8212; they do. But for many people with stable heart disease, the compass shifted. Less toward &#8220;fix the plumbing&#8221; and more toward blood pressure, activity, sleep, and metabolic health. And those same factors matter for cognitive decline too.</p><p>So how do we read that compass ourselves? When you hear a health claim, ask a few basic questions:</p><p>Was this tested in a randomized trial &#8212; where people were actually assigned to an intervention and compared to a control group? Or was it an observational study, where researchers noticed that people who did one thing tended to have better outcomes? How large was the study? Has it been repeated? Is there a meta-analysis summarizing the broader evidence?</p><p>And most importantly: did the study measure something that actually matters? Did people live longer? Have fewer heart attacks? Think better? Function better? Or did only a lab value change?</p><p>A biomarker is not necessarily a meaningful outcome. Changing a number on a blood test is not the same as helping someone live better.</p><h2>The N-of-1 Approach</h2><p>Even when the compass points in a reasonably clear direction, the evidence tells us what happens <em>on average</em>. But you&#8217;re not the average person. Neither am I.</p><p>That&#8217;s where the N-of-1 approach comes in.</p><p>Take melatonin and sleep. <a href="https://pubmed.ncbi.nlm.nih.gov/23691095/">A meta-analysis of randomized trials</a> found that melatonin improved how quickly people fell asleep, total sleep time, and sleep quality &#8212; but the average benefit was modest. A few minutes. However, how you respond might be larger, smaller, or nonexistent.</p><p>Pick one change to improve your sleep &#8212; melatonin, earlier meals, a cooler bedroom, or less alcohol before bed. Decide what you&#8217;ll measure: data from an Oura ring, a smartwatch, or just how rested you feel in the morning. Give it a reasonable amount of time. Then ask honestly: did it help?</p><p>And if the answer is yes &#8212; try stopping the intervention. See if the problem comes back. Then restart it and see if things improve again. That stop-and-restart approach gives you much more confidence that the change is actually helping, rather than just coinciding with something else going on in your life.</p><h2>Hype: The Detour</h2><p>Hype lives in the gap between what sounds evidence-based and what actually is. And hype is dangerous because it rarely looks foolish at first. It may sound scientific. It may come from someone credentialed. It may offer a clear explanation when you&#8217;re desperately seeking one. And, it makes you feel proactive and hopeful.</p><p>Here&#8217;s a concrete example: mitochondrial health.</p><p>Mitochondria are real. They matter. They help produce energy in our cells. When someone says fatigue, aging, or brain fog is really a mitochondrial problem &#8212; the story sounds plausible. Compelling, even. And this is where hype starts to build.</p><p>On the supply side-or the person sharing the information, there are often financial incentives: supplements, testing, protocols, online courses. But I don&#8217;t think hype always comes from people knowingly selling nonsense. Sometimes they genuinely believe it. They&#8217;ve seen patients improve. They have a theory that makes sense to them. Believing what you sell doesn&#8217;t mean it works.</p><p>And the message gets packaged in ways that sound persuasive. A credentialed expert says it &#8212; so it must be true. That&#8217;s an appeal to authority, or a type of logical fallacy. A patient tells a powerful story &#8212; so the treatment must work. That&#8217;s an anecdote being treated as proof. The product is natural &#8212; so it must be safer. That&#8217;s an appeal to nature.</p><p>On the receiving side, many of us have real symptoms and real frustration &#8212; fatigue, brain fog, poor sleep, pain, a persistent sense that something just isn&#8217;t right. Maybe conventional medicine hasn&#8217;t given us a satisfying answer. When that happens, we become susceptible to a whole set of cognitive biases.</p><p>Confirmation bias makes us notice evidence that supports what we want to believe, and ignore what contradicts it. Social proof makes us think: if so many people are doing this, there must be something to it. And the halo effect makes us trust someone&#8217;s health claim because they look fit, sound confident, or have expertise in a related area.</p><p>So the mitochondrial story has everything hype needs: a plausible biological mechanism, a credentialed expert, compelling anecdotes, a clear supplement or protocol, and the promise of agency. When all of those forces come together, weak evidence can feel much stronger than it is.</p><p>But here&#8217;s where we come back to the compass. What&#8217;s the actual evidence? For most mitochondria and NAD-related claims, the evidence is not where the hype suggests it is. Some supplements change NAD-related blood tests. But credible evidence that they improve meaningful clinical outcomes &#8212; aging, fatigue, wellness &#8212; just isn&#8217;t there.</p><h2>How to Avoid the Detour</h2><p><strong>Pause.</strong> Hype usually wants urgency &#8212; buy now, believe now, test now. Slow down.</p><p><strong>Follow the money.</strong> Who benefits if you believe this? That doesn&#8217;t automatically make the claim wrong. But it should make you more careful.</p><p><strong>Look for the hype equation.</strong> Is there a cool biological mechanism? A credentialed expert? Compelling anecdotes? A promise of control? The more of those pieces you see together, the more cautious you should be.</p><p><strong>Name the reasoning trap.</strong> Is a story being treated as proof? Is a mechanism being offered as evidence? Is an expert opinion substituting for data?</p><p><strong>Check your own mind.</strong> Am I believing this because the evidence is strong &#8212; or because the story is satisfying and I really need an answer?</p><p>That&#8217;s how we avoid the detour. Not by becoming cynical. By returning to the compass.</p><h2>Perfectionism: The Parking Brake</h2><p>Even if we read the compass better and dodge the obvious detours, there&#8217;s still one more issue working against us.</p><p>If we take the evidence seriously, we quickly find there&#8217;s a lot it supports: exercise more, sleep better, eat better, manage stress, build stronger relationships, control blood pressure, improve cholesterol, drink less alcohol, track this, measure that. Many of those areas are genuinely worthwhile. But if we try to do all of them, all the time, perfectly &#8212; health becomes all-consuming.</p><p>Voltaire said it: the great is the enemy of the good.</p><p>Exercise is a good example. It reduces the risk of heart disease, stroke, diabetes, cognitive decline, falls, and premature death. The evidence on this is about as strong as it gets. But here&#8217;s what the <a href="https://pubmed.ncbi.nlm.nih.gov/25844730/">data actually show</a>: the largest gains go to sedentary people who start taking regular brisk walks. Going from nothing to something produces dramatic benefit. Going from a lot to more &#8212; the marginal returns drop off significantly.</p><p>A vigorous 20 to 30-minute walk most days captures most of the benefit. Doubling or tripling that is fine, but it doesn&#8217;t further reduce mortality nearly as much as you might expect.</p><p>That&#8217;s the parking brake lesson. The goal isn&#8217;t to perfect every detail. The goal is to do enough of the high-value items that actually matter.</p><p>The 80/20 principle applies here &#8212; 80% of the benefit from 20% of the effort. Some changes produce large returns. Exercise is one. Meaningfully improving very poor sleep is another. Reducing alcohol from two drinks a day to one &#8212; not necessarily zero, just one. These moves, for the right person, can be significant.</p><p>But if you&#8217;re already doing a fair bit in these areas &#8212; pause. Congratulate yourself. Then honestly ask: would more actually help? And at what cost? Life is always a balance of benefits and costs. More isn&#8217;t always better. Sometimes good enough is exactly right.</p><h2>What to Actually Do</h2><p>Choose the few actions most likely to matter for you, specifically. Ask where you&#8217;ll get the biggest return.</p><p>If you&#8217;re inactive, start with movement. If sleep is poor, work on sleep. If blood pressure is high, address it. If alcohol is clearly affecting your sleep, mood, weight, or relationships, reduce it.</p><p>And make the plan sustainable. A good plan you can actually follow beats a perfect plan you abandon.</p><h2>The Bottom Line</h2><p>That family member I mentioned at the beginning &#8212; she&#8217;s still at it. Still reading things somewhere, still holding onto them with absolute certainty. And I still find it maddening. But it also still motivates me. Because she&#8217;s not the exception. She&#8217;s the norm. Most of us are looking for answers, and the world is full of people happy to sell us ones that don&#8217;t hold up.</p><p>Here&#8217;s what I&#8217;ve learned:</p><p>How do we use evidence more wisely? We treat it as the compass. Not always easy to read, but essential for staying oriented.</p><p>How do we recognize hype before it pulls us off course? We slow down, look for the hype equation, and remember that a compelling story is not the same as proof.</p><p>How do we pursue health without turning it into a full-time job? We focus on what matters most, make it sustainable, and leave room for joy.</p><p>Follow the compass. Watch for the detours. Release the parking brake.</p><p><em>Health matters enormously. But it&#8217;s not the destination. It&#8217;s what keeps us living the life we actually want to live.</em></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p>]]></content:encoded></item><item><title><![CDATA[Diet Coke and Twinkies]]></title><description><![CDATA[What the Evidence Actually Says About Artificial Sweeteners]]></description><link>https://drbobby.substack.com/p/diet-coke-and-twinkies</link><guid isPermaLink="false">https://drbobby.substack.com/p/diet-coke-and-twinkies</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Thu, 07 May 2026 17:23:32 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>I enjoy diet sodas. My reasoning is simple: if I&#8217;m perfectly happy with the diet version, why spend the calories on the regular one? Save them for something more satisfying&#8212;peanut butter, a brownie, something worth it. That logic feels rational. But it also reminds me of my cardiology professor.</p><p>During my medical training, he would walk the halls with a Diet Coke in one hand and a Twinkie in his pocket. He was sharp, experienced, and a bit overweight. At the time I thought: &#8220;Is this really the nutritional strategy of a heart expert?&#8221; Now I&#8217;m not so sure the answer is obvious. That image&#8212;Diet Coke in one hand, Twinkie in the pocket&#8212;captures the entire artificial sweetener debate in miniature.</p><p>Two questions frame everything that follows: &#8220;Compared to what?&#8221; and &#8220;At what tradeoff?&#8221; Keep those in mind as we work through the evidence.</p><h2>The Strongest Case: Substitution</h2><p>About half of Americans consume non-sugar sweeteners on any given day. The most common are sucralose (Splenda), saccharin (Sweet &#8217;n Low), aspartame (Equal), and stevia&#8212;which, unlike the others, is derived from a plant rather than synthesized. These sweeteners are intensely sweet, somewhere between 200 and 600 times sweeter than sugar, which is why they work in such small amounts.</p><p>The cleanest argument for them is straightforward: if someone regularly drinks calorie-dense beverages and switches to a non-caloric alternative they enjoy just as much, they may reduce their daily calorie intake enough to matter.</p><p>The <a href="https://pubmed.ncbi.nlm.nih.gov/22301929/">CHOICE trial</a> (Choose Healthy Options Consciously Everyday) tested exactly this. It randomized 318 overweight or obese adults into groups that replaced sugary beverages with either water or diet drinks. Over six months, both groups lost about 2% of their body weight. Modest, but real. The study doesn&#8217;t say diet soda is good for you. It says: if the alternative is a sugary drink, a diet drink may be a useful swap.</p><p>That&#8217;s the theme that runs through this entire topic. Artificial sweeteners look best when they&#8217;re replacing sugar. They look weaker when they&#8217;re replacing water. And they look most problematic when they become a permission slip for a Twinkie.</p><h2>Five Myths&#8212;and What the Evidence Actually Shows</h2><p><strong>Myth 1: Artificial sweeteners cause cancer</strong></p><p>This fear has a specific origin. In the late 1960s and 1970s, animal studies linked cyclamate and saccharin with bladder cancer in male rats. Cyclamates were banned in the United States in 1969. Saccharin landed on a carcinogen list. But the doses involved were enormous&#8212;one estimate put them at the equivalent of hundreds of diet sodas per day. The mechanism turned out not to apply to humans, and the National Cancer Institute removed saccharin from the carcinogen list in 2000.</p><p>The modern concern is more subtle. A large French observational study called the <a href="https://pubmed.ncbi.nlm.nih.gov/35324894/">NutriNet-Sant&#233; cohort</a>, which followed over 100,000 adults, found that heavier consumers of artificial sweeteners had a roughly 13% higher overall cancer risk. Aspartame and acesulfame-K were the main sweeteners flagged. But this was observational research&#8212;participants weren&#8217;t randomized to consume sweeteners or avoid them. People who drink more diet soda may differ from those who don&#8217;t in weight, diabetes risk, smoking habits, and many other ways that are hard to fully account for. Observational findings generate hypotheses. They don&#8217;t establish cause and effect.</p><p>My read: a couple of diet sodas a day is unlikely to be a meaningful driver of cancer risk compared with everything else in a person&#8217;s life.</p><p><strong>Myth 2: Diet soda makes you gain weight</strong></p><p>This one emerged from observational studies where diet soda drinkers tended to look metabolically worse. The likely explanation is reverse causation: people often switch to diet drinks because they&#8217;re already gaining weight or already worried about their blood sugar. The soda didn&#8217;t cause the problem; it just marked someone already at risk.</p><p>Randomized trials support that interpretation. In the <a href="https://pubmed.ncbi.nlm.nih.gov/37794246/">SWITCH trial</a>, 500 overweight or obese adults were assigned to drink either water or artificially sweetened beverages while receiving general weight-loss guidance. At one year, the water group had lost about 13 pounds and the diet beverage group had lost about 16.5 pounds. Diet soda isn&#8217;t a weight-loss drug&#8212;but it clearly doesn&#8217;t appear to cause weight gain.</p><p><strong>Myth 3: Diet soda disrupts glucose metabolism</strong></p><p>The idea here is biologically plausible: sweet taste isn&#8217;t just a flavor signal&#8212;it&#8217;s connected to a system involving the gut, brain, and hormones. Maybe tricking that system has consequences.</p><p>The <a href="https://doi.org/10.2337/dc25-1516">SODAS trial</a> (Study of Drinks with Artificial Sweeteners&#8212;researchers seem to enjoy clever acronyms) randomized 181 adults with type 2 diabetes. One group continued drinking 24 ounces per day of artificially sweetened beverages; the other replaced that amount with plain water for 24 weeks. There was no meaningful difference in glycemic outcomes between the groups. If diet beverages were secretly worsening blood sugar control, replacing them with water should have helped. It didn&#8217;t. Myth not supported.</p><p><strong>Myth 4: Diet soda tricks your brain and drives you to eat more</strong></p><p>The theory: sweet foods usually come with calories, so the brain learns to expect them together. Break that pairing with a zero-calorie sweetener, and the brain may go searching for the real thing&#8212;hence the Twinkie.</p><p>Some animal studies support this mechanism, and anecdotally some people do experience it: the diet soda doesn&#8217;t satisfy the craving and they reach for something sweet. But if this compensation effect were common, the substitution trials would have failed&#8212;people would have simply eaten back the saved calories. That&#8217;s not what the <a href="https://pubmed.ncbi.nlm.nih.gov/22301929/">CHOICE</a> or <a href="https://pubmed.ncbi.nlm.nih.gov/37794246/">SWITCH</a> trials showed.</p><p>The more accurate picture is that it depends on the person and the purpose. For someone who wants fizz and caffeine with lunch, a diet soda is a fine substitute for a regular one. For someone using it as a stand-in for dessert, it may not scratch the itch&#8212;and the Twinkie may follow. The question worth asking isn&#8217;t &#8220;Does Diet Coke cause people to eat Twinkies?&#8221; It&#8217;s &#8220;Does it help justify them?&#8221; That&#8217;s something each person can observe in themselves.</p><p><strong>Myth 5: Artificial sweeteners wreck the gut microbiome</strong></p><p>A <a href="https://pubmed.ncbi.nlm.nih.gov/25231862/">2014 study</a> with the dramatic title &#8220;Artificial sweeteners induce glucose intolerance by altering the gut microbiota&#8221; generated considerable buzz. The key findings, though, were primarily from mice. The human portion involved seven healthy volunteers given high-dose saccharin for a week, and four of the seven showed microbiome changes and worsened glycemic responses. Interesting as a hypothesis. Not evidence of a public health problem.</p><p>The <a href="https://www.nature.com/articles/s42255-025-01381-z">SWEET trial</a> (Sweeteners and Sweetness Enhancers: Impact on Health, Obesity, Safety and Sustainability) tested this more rigorously in 341 overweight or obese adults. Half used non-sugar sweeteners; half did not. Both groups lost weight. The sweetener group did show microbiome changes&#8212;but the changes were characterized as beneficial, not harmful. That&#8217;s a very different result from the mouse study.</p><p>For context: fiber changes the microbiome. Exercise changes the microbiome. The fact that non-sugar sweeteners have some microbiome effect doesn&#8217;t tell us the effect is bad.</p><h2>Don&#8217;t Forget the Twinkie</h2><p>Food and drink aren&#8217;t just fuel. They provide pleasure, ritual, and social connection. A cold diet soda with lunch may give someone real enjoyment that plain water simply doesn&#8217;t. That doesn&#8217;t make it a health food, but it also shouldn&#8217;t be dismissed. A joyless diet that gets abandoned is not better than a pretty-good diet that actually sticks.</p><p>The more important question, though, is what&#8217;s sitting next to the diet soda. The Twinkie in my professor&#8217;s pocket matters&#8212;not because one Twinkie is catastrophic, but because ultra-processed food patterns make overeating easier. A controlled <a href="https://www.cell.com/cell-metabolism/fulltext/S1550-4131(19)30248-7">study</a> found that people randomly assigned to an ultra-processed food diet ate roughly 500 more calories per day than those without it and gained weight accordingly. One Twinkie probably won&#8217;t cause that. A habit of Twinkies justified by the Diet Coke might.</p><p>The risk is in staring so hard at the Diet Coke that you miss what&#8217;s in the pocket.</p><h2>The Verdict</h2><p>Was my professor wise or misguided? Probably a bit of both. Wise if the Diet Coke replaced a regular Coke. Misguided if it gave him license for a daily Twinkie habit.</p><p>The same logic applies to the rest of us. Artificial sweeteners are not poison. The cancer signals come from animal studies using massive doses and from observational data too messy to draw clean conclusions from. The weight-gain narrative dissolves when you run proper randomized trials. The glucose and microbiome concerns are theoretically interesting but not well-supported by the best available evidence.</p><p>In nutrition, the right question is almost never &#8220;Is this one thing good or bad?&#8221; It&#8217;s: compared to what, at what dose, for whom, and at what tradeoff?</p><p>Compared to a sugary soda: diet drinks appear to be a reasonable swap for many people. Compared to water: probably a step down, but that doesn&#8217;t make them harmful. Compared to a permission slip for a daily Twinkie: that&#8217;s where the bargain might go wrong.</p><p>I&#8217;ll keep enjoying diet sodas. But I&#8217;ll also keep checking my pockets for Twinkies.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share Dr Bobby Live Long and Well&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share Dr Bobby Live Long and Well</span></a></p><p></p>]]></content:encoded></item><item><title><![CDATA[Physiology Beats Understanding]]></title><description><![CDATA[Why insight alone often isn't enough]]></description><link>https://drbobby.substack.com/p/physiology-beats-understanding</link><guid isPermaLink="false">https://drbobby.substack.com/p/physiology-beats-understanding</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Fri, 01 May 2026 16:45:40 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/196134967/3c59bf50183648012a6cc2143d4b5a4b.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>For roughly twenty years, I wasn&#8217;t particularly happy. Not depressed in a clinical sense &#8212; I had a good life, a career I cared about, people I loved. But there was a persistent low-level flatness that never quite lifted. Dysthymia, it&#8217;s called. I tried psychotherapy. I meditated seriously. I read, reflected, and accumulated genuine insight into where the feelings might have originated.</p><p>None of it changed how I felt.</p><p>Here&#8217;s an analogy that captures what I eventually realized. Imagine you have a bee-sting allergy &#8212; a serious one, where a sting sends your body into full allergic reaction. Asking &#8216;why did the bee sting <em>me</em>?&#8217; or &#8216;what did I do to deserve this?&#8217; is understandable. But it&#8217;s not immunotherapy, which is what your body actually needs.</p><p>In a surprising number of psychological problems, something similar is true. Understanding the cause isn&#8217;t the treatment.</p><p>Back to my dysthymia. After two decades with those symptoms, I noticed something important: a strong cup of coffee would briefly lift my mood. Not permanently, but enough to be a clue. A psychiatrist connected the dots and suggested Wellbutrin, an antidepressant with an activating, energizing profile. I started the medication &#8212; and within essentially one day, the dysthymia was gone. Not gradually reduced. Gone.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/physiology-beats-understanding?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/physiology-beats-understanding?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><p>Being an N-of-1 experimenter by nature, I&#8217;ve stopped and restarted the drug many times over the decades since. The pattern is consistent: off the medication, symptoms return within a week. Back on, they resolve. Other family members have had nearly identical experiences. There&#8217;s almost certainly a genetic, neurochemical basis at work.</p><p>Now, I want to be clear: that&#8217;s one person&#8217;s anecdote. It is not a clinical study. But it planted a question that I&#8217;ve been sitting with ever since: why did two decades of understanding fail to move the needle, while a small molecule fixed the problem in a day? What does that say about the nature of suffering &#8212; and about what actually may resolve it, at least in some circumstances?</p><h3><strong>The Explanation Trap</strong></h3><p>That question turns out to be more than personal. It touches something universal about how human beings relate to their own pain.</p><p>We are explanation-hungry creatures. We don&#8217;t like randomness or uncertainty, so when we suffer, we go looking for a story. Why am I like this? Why do I keep reacting this way? Why can&#8217;t I stop? Finding an explanation feels like progress &#8212; and sometimes it genuinely is. But one of the quiet traps of being human is that discovering a story can create the illusion of progress.</p><p>Explanation is not the same as feeling better.</p><h3><strong>What Everyday Life Already Teaches Us</strong></h3><p>Consider something every one of us has experienced: a bad night of sleep. After one or two nights of poor rest, we&#8217;re irritable, reactive, and less able to handle stress. Problems feel bigger. The world feels harder. Then, after a good night&#8217;s sleep, life looks different again &#8212; not because we&#8217;ve gained new insight into our past, but because our physiology shifted.</p><p>The research confirms what we already intuitively know. A <a href="https://pubmed.ncbi.nlm.nih.gov/38127505/">2024 systematic review and meta-analysis</a> drawing on more than 50 years of sleep-loss research found that insufficient sleep consistently worsens emotional functioning &#8212; making people feel worse and handle emotions less well. We even have folk sayings for it: &#8220;Sleep on it.&#8221; &#8220;Things will look better in the morning.&#8221; The wisdom and the science agree.</p><p>Breathwork tells the same story. Before a difficult conversation or a high-stakes moment, a few slow deliberate breaths don&#8217;t give you better self-knowledge. They settle your nervous system.</p><p>A <a href="https://pubmed.ncbi.nlm.nih.gov/36630953/">2023 randomized controlled trial</a> with 100 participants found that just five minutes of daily structured breathing exercises improved mood, reduced anxiety, and lowered physiological markers of stress. The body changes first. The mind follows.</p><h3><strong>When the Stakes Get Higher: Depression and the Brain</strong></h3><p>If sleep and breath already demonstrate this principle in ordinary life, what happens when we look at clinical depression &#8212; where the suffering is deeper and the stakes are higher?</p><p>Electroconvulsive therapy (ECT) offers perhaps the clearest example. Under general anesthesia, an electrical stimulus produces a controlled seizure in the brain. It&#8217;s reserved for severe or treatment-resistant depression, and nobody suggests it works because patients arrive at a better narrative about themselves. It changes brain chemistry directly.</p><p>A <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(03)12705-5/abstract">meta-analysis published in The Lancet</a> examining six randomized trials and roughly 250 patients found substantial improvement in depression symptoms, often within days to a few weeks. The parallels to my Wellbutrin experience aren&#8217;t lost on me: in both cases, something changed the state of the organism &#8212; and the emotional relief followed.</p><p>Implantable Vagus nerve stimulation (VNS) makes the same point from a different angle. A surgeon places a small pulse generator under the skin of the chest, connected to the left Vagus nerve. The device sends regular electrical pulses into the nerve that links the brain to the body&#8217;s internal organs. A <a href="https://pubmed.ncbi.nlm.nih.gov/41106630/">2025 systematic review</a> across roughly 900 patients found that between one-third and one-half responded meaningfully, with many remaining in remission. Mood is not just a story we tell ourselves. It&#8217;s a biological state that can sometimes be altered by changing the body&#8217;s signaling pathways.</p><h3><strong>Rewiring Fear: Where I Am Right Now</strong></h3><p>Which brings me to the second personal thread in this episode &#8212; one that&#8217;s still unfolding.</p><p>I&#8217;m a happy person overall. I have this podcast, my wife Gail, our family, Ironman triathlon, and <a href="https://madronespringsranch.com/">Madrone Springs Ranch</a> with its kangaroos and exotic animals and bed-and-breakfast guests. But when I exercise hard, fears reliably surface: fear that I can&#8217;t handle the discomfort, that I&#8217;ll run out of energy, that I&#8217;ll quit and feel ashamed. As an Ironman triathlete, those fears rob real joy from something that&#8217;s central to my life.</p><p>I&#8217;ve spent years trying to understand those fears &#8212; meditating on them, observing them, naming them. No change. The fears persist exactly as before.</p><p>So I&#8217;m now trying something different: EMDR, or Eye Movement Desensitization and Reprocessing. In a structured session, I call up the fearful memory or sensation while tracking a ball moving back and forth on a screen. The bilateral eye movement appears to help the brain reprocess and loosen the grip associated with those fear memories. It&#8217;s been studied primarily in PTSD &#8212; where specific traumatic memories trigger fear responses &#8212; and the mechanism isn&#8217;t fully understood. Does the bilateral focus put the brain in a better state for rewiring? We genuinely don&#8217;t know.</p><p>What we do know is that it works for many. A <a href="https://onlinelibrary.wiley.com/doi/abs/10.5694/mja16.00540">meta-analysis of 12 randomized trials</a> in approximately 700 people found EMDR substantially more effective than no treatment in reducing trauma-related fear. EMDR isn&#8217;t about understanding where a fear came from. It&#8217;s about directly retraining the brain&#8217;s response to it.</p><p>Desensitization therapy works on the same principle &#8212; think of it as allergy shots for fear. Repeated, graduated exposure in a safe setting doesn&#8217;t give you insight into why you fear heights or snakes; it retrains the alarm response through direct experience.</p><p>A <a href="https://onlinelibrary.wiley.com/doi/abs/10.5694/mja16.00540">meta-analysis of 16 studies</a> found substantial reductions in anxiety for people treated with desensitization therapy for fear of heights. Like ECT, gains may diminish over time without reinforcement &#8212; but the initial effect is real.</p><p>I don&#8217;t have PTSD, and I&#8217;m not presenting my early EMDR experience as evidence of anything. But I&#8217;m struck by the possibility that I may still feel the physical reality of hard exertion &#8212; the discomfort, the labored breathing &#8212; while losing the fears that have become tangled up with those sensations. Physiology might change something that understanding never touched. Again.</p><h3><strong>An Emerging Frontier Worth Watching</strong></h3><p>It would be incomplete to close without mentioning psilocybin &#8212; early, promising, and still highly experimental. Part of the excitement is the concept of neuroplasticity: the brain&#8217;s ability to change its connections. <a href="https://www.sciencedirect.com/science/article/pii/S0165614725002007">Recent reviews</a> suggest psilocybin may temporarily increase neuroplasticity, potentially making entrenched negative patterns more amenable to change. It&#8217;s not a therapy to seek out today. But it points toward a future where the biology of belief and fear becomes directly targetable &#8212; which, if my own experience is any guide, may be exactly where the real leverage lives.</p><h3><strong>A Clarification Worth Making</strong></h3><p>None of this is an argument against insight therapy. Therapy can be genuinely valuable for grief, relationship challenges, difficult life decisions, and making sense of long-standing patterns. Insight can be true, deep, and meaningful.</p><p>The point is narrower: insight can be real and still not relieve suffering. When that&#8217;s the case, it&#8217;s worth asking whether the problem is biological &#8212; and whether a biological or physiological intervention might help where understanding has not.</p><h3><strong>The Bottom Line</strong></h3><p>The mind loves stories. The nervous system sometimes needs retraining. Those are two different things &#8212; and confusing them is one of the quieter traps of being human.</p><p>If you&#8217;ve been working hard to understand your anxiety, your depression, your fears, and the understanding hasn&#8217;t brought relief, that&#8217;s not a failure of effort or intelligence. It may simply mean the solution lies somewhere else: in a good night&#8217;s sleep, a breathing practice, a medication, a nerve stimulator, or a structured therapy that works not by explaining fear but by directly retraining the brain&#8217;s response to it.</p><p>I spent twenty years understanding my dysthymia. A small molecule fixed it in a day. I&#8217;ve spent years understanding my exercise fears. A screen with a moving ball may yet do what meditation could not.</p><p>Relief often comes when physiology changes. That&#8217;s not a dismissal of the mind. It&#8217;s a reminder that the mind rides on a body &#8212; and sometimes, that&#8217;s where the work needs to happen.</p><p><em>Dr. Bobby (Robert W. Dubois, MD PhD) is the host of the Live Long and Well podcast.He reads the studies so you don&#8217;t have to.</em></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/physiology-beats-understanding/comments&quot;,&quot;text&quot;:&quot;Leave a comment&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/physiology-beats-understanding/comments"><span>Leave a comment</span></a></p><p></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!5Mye!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_424, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 424w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_848, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 848w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_1272, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 1272w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_1456, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!5Mye!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png" width="1418" height="946" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/b4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:946,&quot;width&quot;:1418,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:null,&quot;alt&quot;:&quot;&quot;,&quot;title&quot;:null,&quot;type&quot;:null,&quot;href&quot;:null,&quot;belowTheFold&quot;:true,&quot;topImage&quot;:false,&quot;internalRedirect&quot;:null,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" title="" srcset="/__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_424, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 424w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_848, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 848w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_1272, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 1272w, /__u/substackcdn.com/image/fetch/$s_!5Mye!, /__u/drbobby.substack.com/w_1456, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb4f6e75c-26db-41e1-9f57-c9642588b95d_1418x946.png 1456w" sizes="100vw" loading="lazy"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[When Acupuncture and Massage Work—and When They Don’t]]></title><description><![CDATA[Massage and acupuncture are two of the most widely used complementary health therapies in the country.]]></description><link>https://drbobby.substack.com/p/when-acupuncture-and-massage-workand</link><guid isPermaLink="false">https://drbobby.substack.com/p/when-acupuncture-and-massage-workand</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 14 Apr 2026 11:01:13 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/193714500/b33b3ee15e762df248cc9da5755a1c72.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>Massage and acupuncture are two of the most widely used complementary health therapies in the country. According to the <a href="https://www.nccih.nih.gov/research/national-health-interview-survey-2022/graph-titled-use-of-complementary-health-approaches-20-year-trends">2022 National Health Interview Survey</a>, 11 percent of U.S. adults used massage in the prior year, and 2 percent used acupuncture. At roughly $100 a session each, that is a lot of time, money, and hope being invested. So the obvious question is: do they actually work?</p><p>The honest answer is more complicated than either enthusiasts or skeptics tend to admit. These therapies can help&#8212;but usually for narrower things, and in shorter-lived ways, than the marketing suggests.</p><h2>A Question Worth Separating into Two</h2><p>Before looking at what the studies say, it helps to draw a distinction that rarely gets made explicitly. There is a difference between a treatment making you feel better and a treatment actually changing the underlying problem.</p><p>Massage might relax your muscles, reduce soreness, and lower your anxiety without accelerating tissue healing by a single day. Acupuncture might blunt pain signals without shortening the course of whatever is causing the pain. Feeling better temporarily is a real benefit&#8212;but it is a different benefit than fixing the problem, and conflating the two leads to inflated expectations and misplaced confidence.</p><p>The evidence, as we will see, is mostly on the &#8220;feel better&#8221; side of that line. The evidence for actually changing the course of injury or illness is thin.</p><h2>The Comparison Problem</h2><p>One thing that makes evaluating these therapies tricky is what researchers compare them against.</p><p>When massage or acupuncture is compared to no treatment at all, both tend to look quite effective. But the more informative comparison is against a sham treatment&#8212;a fake or imitation version of the therapy that seems real to the patient but lacks the active ingredient. In drug trials, this is a placebo pill. In acupuncture research, it might mean needles placed in the wrong locations. In massage research, it might be light touch or a simulated contact.</p><p>The problem is that sham treatments for massage and acupuncture are hard to design. As <a href="https://pubmed.ncbi.nlm.nih.gov/39008297/">a recent evidence review in JAMA Network Open</a> pointed out, even light touch may have real positive effects&#8212;which means the &#8220;placebo&#8221; isn&#8217;t really inert. And for acupuncture, the benefits look considerably more impressive when compared with no treatment than when compared with sham acupuncture. That gap matters when interpreting the evidence.</p><h2>What the Massage Evidence Actually Shows</h2><p>Massage is not one thing. Swedish massage is gentler and relaxation-focused. Deep tissue massage is more targeted and intense. Sports massage is designed around athletic recovery. Because the intervention varies so much, it is hard to draw clean conclusions across studies.</p><p>The proposed mechanisms are also multiple. Massage may work mechanically, by temporarily changing how tissues move. It may work neurologically, by altering pain signaling. Or it may work psychologically&#8212;lying on a table, listening to music, receiving attentive hands-on care changes how the brain interprets discomfort, even if the underlying tissue hasn&#8217;t changed at all. Almost certainly it is some combination of all three.</p><p>For immediate symptom relief, the case is reasonably solid. A <a href="https://pubmed.ncbi.nlm.nih.gov/20347836/">randomized trial in 113 cardiac surgery patients</a> found that massage significantly improved pain, anxiety, tension, and relaxation compared with quiet rest. A second <a href="https://pubmed.ncbi.nlm.nih.gov/26256133/">study in 127 colorectal surgery patients</a> found similar improvements in perceived pain, tension, and anxiety compared with a social visit. These are real results.</p><p>But they are short-term results in specific clinical settings. They do not tell us that massage has lasting effects or speeds tissue healing.</p><p>For neck and shoulder pain, the picture is mixed. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3600270/">2013 review of 12 studies with 757 participants</a> found that massage outperformed inactive comparisons but did not clearly beat other active treatments like exercise or traction&#8212;and did not improve patients&#8217; function overall.</p><p>For low back pain, the evidence is similarly unimpressive. A <a href="https://pubmed.ncbi.nlm.nih.gov/26329399/">2015 meta-analysis of 25 trials involving more than 3,100 patients</a> found that the studies were of low quality, that massage appeared to help pain but not function, and that the advantage largely disappeared when compared against active controls. The authors&#8217; own conclusion was frank: they had very little confidence that massage is an effective treatment for low back pain.</p><p>For post-exercise soreness, a <a href="https://pubmed.ncbi.nlm.nih.gov/32426160/">2020 systematic review pooling 29 studies</a> found no evidence that sports massage improved strength, sprint performance, endurance, jump performance, or fatigue. It did find a small effect on flexibility and about a 13 percent reduction in delayed-onset muscle soreness&#8212;the kind of achiness that follows an intense workout. That is a real but modest benefit, and it is specifically about feeling less sore, not about performing better or recovering faster in any objective sense.</p><p>The overarching problem is quality. As <a href="https://pubmed.ncbi.nlm.nih.gov/39008297/">that same JAMA Network Open review</a> noted, the massage literature is dominated by small trials, varying techniques, inconsistent comparison groups, and limited methodological rigor. The popular claims&#8212;that massage breaks up scar tissue, flushes out toxins, improves circulation, or helps injured tissue heal faster&#8212;are mechanistic claims, and the clinical evidence for them is far thinner than the evidence for short-term relief.</p><h2>What the Acupuncture Evidence Actually Shows</h2><p>Acupuncture comes from traditional Chinese medicine and has been practiced in some form for <a href="https://www.nccih.nih.gov/health/acupuncture-effectiveness-and-safety">at least 2,500 years</a>. It is worth separating two types of claims about how it might work: local effects, where a needle near a painful area changes local sensitivity or pain processing, and distant effects, where a needle in the foot or hand is supposed to affect symptoms elsewhere in the body through meridians or other nonlocal pathways. What is actually happening biologically is not well understood.</p><p>For some uses, the evidence is reasonably encouraging. A <a href="https://pubmed.ncbi.nlm.nih.gov/40731916/">2025 meta-analysis pooling 16 randomized trials with 1,247 patients</a> found that acupuncture did not significantly reduce acute nausea or vomiting in cancer patients but did significantly reduce delayed vomiting, particularly when treatment lasted at least five days. The study quality had limitations, but that is a meaningful signal.</p><p>For migraine prevention, the evidence is among the stronger examples in acupuncture research. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4977344/">2016 Cochrane review of 22 trials with nearly 5,000 participants</a> found that acupuncture reduced headache frequency, outperformed sham acupuncture (though the margin was modest), and performed at least as well as preventive medications with fewer side effects. That is a combination worth taking seriously.</p><p>For chronic low back pain, the picture echoes what we saw with massage: more impressive against no treatment than against sham. A <a href="https://www.cochrane.org/evidence/CD013814_acupuncture-chronic-non-specific-low-back-pain-lbp">2020 Cochrane review of 33 trials with 8,270 participants</a> found some immediate pain relief compared with no treatment, but no clear advantage over sham acupuncture for either pain or function. That gap suggests that some of the benefit may come from the ritual of treatment&#8212;the attentive practitioner, the expectation of improvement&#8212;rather than from needle placement itself.</p><p>For tennis elbow, a <a href="https://pubmed.ncbi.nlm.nih.gov/32318130/">2020 systematic review</a> found some positive trials but described the evidence base as small and methodologically shaky. The most defensible conclusion is that acupuncture may help short-term pain in tennis elbow. That is a long way from a durable, clearly superior treatment&#8212;and there is no evidence it shortens the duration of the condition.</p><p>For the broader list of things acupuncture is sometimes marketed for&#8212;fertility, allergies, asthma, weight loss, immune boosting, general wellness&#8212;the evidence simply is not there. That does not mean every one of those uses has been definitively disproven. It means the claims have run well ahead of the science.</p><h2>Where This Lands</h2><p>The evidence does not support a blanket verdict in either direction. Saying &#8220;massage works&#8221; or &#8220;acupuncture is powerful&#8221; overstates what the research shows. But dismissing them entirely misses the real, if narrow, benefits that do appear.</p><p>Massage seems most useful for immediate relaxation, short-term symptom relief, and modest reductions in exercise-related soreness. Acupuncture has a stronger case in a few specific areas: reducing delayed vomiting in cancer care, preventing migraines, and providing some short-term relief in certain chronic pain conditions. In both cases, the benefits are mostly about how you feel, not about structural healing or changing the course of disease.</p><p>When the claims get bigger&#8212;when a practitioner suggests these therapies will heal your injury faster, correct structural problems, or treat a long list of unrelated conditions&#8212;the evidence is not there to back that up.</p><p>The answer is less dramatic than the hype, but more useful: these therapies may help, for certain problems, in limited ways. Knowing that going in lets you make a clear-eyed choice about whether the benefit is worth your time and money&#8212;rather than assuming the treatment is doing more than it actually is.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/when-acupuncture-and-massage-workand/comments&quot;,&quot;text&quot;:&quot;Leave a comment&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/when-acupuncture-and-massage-workand/comments"><span>Leave a comment</span></a></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/when-acupuncture-and-massage-workand?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/when-acupuncture-and-massage-workand?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><p></p>]]></content:encoded></item><item><title><![CDATA[Why Smart People Fall for Health Headlines/Hype ]]></title><description><![CDATA[Watch now | How to Vaccinate Yourself Against It]]></description><link>https://drbobby.substack.com/p/why-smart-people-fall-for-health</link><guid isPermaLink="false">https://drbobby.substack.com/p/why-smart-people-fall-for-health</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Mon, 06 Apr 2026 20:31:42 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/193394590/4107059da19f3b7ef43f700daffecde7.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>You&#8217;ve seen enough misleading headlines to be skeptical, you&#8217;ve heard the promises that didn&#8217;t pan out, and you&#8217;re aware that the wellness industry is very good at selling things that may not work. And yet &#8212; you still feel something shift when you pick up a product labeled &#8220;all natural.&#8221; You still pause when you read that a remedy has been used for five thousand years by millions of people.</p><p>That pull you feel? It&#8217;s not ignorance, and it&#8217;s not weakness. It&#8217;s biology. Understanding what&#8217;s happening in your brain &#8212; and why &#8212; is how you actually protect yourself against it.</p><p>I&#8217;ll start with a confession. I&#8217;m a physician with a PhD, 180 peer-reviewed publications, and 66 podcast episodes devoted to teaching critical thinking about health claims. At a recent vet visit for my three Vizslas, my trusted veterinarian told me the rattlesnake vaccine I&#8217;d been giving them for years doesn&#8217;t have solid evidence behind it &#8212; and some vaccinated dogs actually seem to fare worse after a bite. I heard all of that clearly.</p><p>And then I ordered the vaccine anyway&#8230;</p><p>That moment is exactly what this is about. The gap isn&#8217;t between ignorance and knowledge. It&#8217;s between <em>knowing</em> and <em>doing</em>. Closing that gap requires understanding two things that happen every time a health claim draws you in.</p><p><strong>Two Things Happening at Once</strong></p><p>The first is a LOGICAL FALLACY &#8212; a flaw in the argument being made. Broken steps in reasoning that create a convincing-sounding case even when the evidence isn&#8217;t there. The second is a COGNITIVE BIAS&#8212; a flaw in how your brain processes those arguments. Mental shortcuts evolved to help humans make fast decisions. They&#8217;re not character flaws. Every person has them, including researchers and physicians. The wellness industry has simply become very good at exploiting both.</p><p>You need to understand them together. Knowing <em>only</em> the fallacy lets you spot a flawed argument but doesn&#8217;t stop you from feeling drawn to it. Knowing <em>only</em> your biases tells you why you&#8217;re vulnerable but not which pitfalls to watch for. The combination is the VACCINATION.</p><p><strong>AG1: When Natural Sounds Like Safe</strong></p><p>AG1 is one of the most heavily marketed supplements in the wellness space right now. One scoop of green powder, everything your body needs. The ingredient list reads like a walk through a farmer&#8217;s market: ashwagandha, licorice root, beet root, ginger, mushrooms, and grape seed.</p><p>The logical fallacy at work is the <em>Appeal to Nature</em> &#8212; the implicit argument that natural equals safe and effective. But arsenic is natural. Cobra venom is natural. Meanwhile, statins are completely synthetic and have saved hundreds of thousands of lives in randomized controlled trials spanning decades. AG1 also deploys <em>Appeal to Authority</em> (Hugh Jackman and Andrew Huberman swear by it) and <em>Appeal to Popularity</em> (fifty thousand five-star reviews). Huberman has genuine expertise in neuroscience. That doesn&#8217;t automatically extend to every ingredient in a green powder, but our brains grant it anyway.</p><p>The cognitive machinery underneath is the <em>Halo Effect </em>&#8212; when someone impresses us in one area, our brains extend their credibility everywhere else. Fifty thousand positive reviews activates <em>Social Proof</em>, a deeply wired instinct that makes following the crowd feel like the safe choice. These responses happen before your rational brain gets involved.</p><p>The antidote: ask whether there are randomized controlled trials. Ask whether the endorser&#8217;s expertise actually applies here. Ask whether popularity reflects effectiveness or just good marketing.</p><p><strong>Traditional Chinese Medicine: When Old Feels Like Proven</strong></p><p>Turmeric is everywhere &#8212; capsules, lattes, skincare &#8212; all carrying the message that it has been used in Ayurvedic and Chinese medicine for over five thousand years to fight inflammation. The implication: they figured this out a long time ago.</p><p>This is the <em>Appeal to Antiquity fallacy</em>. Age does not equal proof. Bloodletting was practiced for over two thousand years by respected physicians and nearly killed George Washington. Mercury was used as medicine for centuries. Time preserves things because of culture, tradition, and habit &#8212; not because they work.</p><p>Turmeric makes the point well. The proposed anti-inflammatory mechanism involving curcumin is plausible. But clinical trial after clinical trial has failed to show meaningful benefit, largely because curcumin has very poor bioavailability &#8212; your body barely absorbs it. The history is long; the evidence is thin.</p><p>The accompanying bias is the <em>Narrative Bias</em>. A grandmother&#8217;s remedy passed through generations weighs far more heavily in our minds than a table of statistics. Stories feel true in a way that data doesn&#8217;t. That&#8217;s not a flaw &#8212; it&#8217;s how human cognition works. It&#8217;s also how a lot of ineffective products get sold.</p><p><strong>Detox Products: When Fear Does the Convincing</strong></p><p>Juice cleanses, activated charcoal, colon resets &#8212; the message is always the same. Your body has accumulated something harmful, and this product will remove it. You&#8217;ll feel lighter, clearer, and more energized. The toxins will be gone.</p><p>One useful question: when did you last see a detox product that named the specific toxin it removes, with a measurement, a mechanism, and a before-and-after test showing levels actually went down? It doesn&#8217;t happen &#8212; because being specific would allow the claim to be quickly debunked. The vagueness is not accidental.</p><p>Your body already has a detoxification system &#8212; your liver and kidneys &#8212; running continuously. When they actually fail, the result is a medical emergency, not something that responds to juice. The <em>Root Cause Fallacy</em>, which travels alongside detox marketing, promises that one simple imbalance explains all your symptoms. Most chronic conditions are multifactorial. A single correctable root cause is almost never how complex illness works.</p><p>The bias doing the heavy lifting is the <em>Disgust Response</em> &#8212; one of the oldest human emotions, activated directly by the word &#8220;toxins.&#8221; You don&#8217;t decide to feel contaminated; the feeling arrives before the thought. <em>Simplicity Bias </em>compounds it: a clear, simple explanation feels like relief even when it&#8217;s wrong. That feeling of certainty can override careful evaluation of whether the answer is actually correct.</p><p><strong>The Vaccination</strong></p><p>Two questions. Every time a health claim draws you in.</p><ol><li><p>What&#8217;s creating the pull &#8212; which logical fallacy is at work? </p></li><li><p>Why am I drawn to it &#8212; which cognitive bias is firing? </p></li></ol><p>Then, what does the evidence actually say &#8212; not the mechanism, not the testimonials, not the tradition, but controlled trials independently replicated?</p><p>If what you have is a plausible mechanism, a long tradition, or a compelling story, you have a hypothesis. Worth watching. Not worth acting on yet.</p><p>I knew there were no controlled trials supporting the rattlesnake vaccine. My vet told me directly that some practitioners had stopped using it. I had everything I needed to pause.</p><p>But, I ordered the vaccine anyway. My pattern-seeking brain had connected the vaccine to my dogs surviving previous bites. My bias toward keeping things as they were said don&#8217;t change what&#8217;s working. All of that happened automatically, and it felt like reasoning. It was really just a reaction dressed up as a decision.</p><p>You can&#8217;t stop the halo effect from firing when a celebrity endorses something. You can&#8217;t stop the disgust response from activating when someone says toxins. But you can notice it happening. Naming it creates just enough distance between the feeling and the decision for your rational brain to catch up.</p><p>That noticing &#8212; that deliberate pause &#8212; IS the vaccination.</p>]]></content:encoded></item><item><title><![CDATA[Invite your friends to read Dr Bobby Live Long and Well]]></title><description><![CDATA[Thank you for reading Dr Bobby Live Long and Well!]]></description><link>https://drbobby.substack.com/p/invite-your-friends-to-read-dr-bobby</link><guid isPermaLink="false">https://drbobby.substack.com/p/invite-your-friends-to-read-dr-bobby</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Sat, 04 Apr 2026 10:16:19 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!kIi9!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63841f06-72d0-48cf-9fd1-602d56343bd6_1272x1272.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Thank you for reading Dr Bobby Live Long and Well!  As you may know, I have no financial motives with my podcast and SubStack-no advertisers, subscription fees or ownership of health related companies.  My reward is having you learn better how to Live Long and Well&#8212;and if more folks read or listen, that would be great.  If you don&#8217;t subscribe to my podcast, it is located on <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple</a> or <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9?si=e346924e09e446cc">Spotify</a> or elsewhere&#8230;please sign up.  I have #66 episodes so far.</p><p>If you enjoy Dr Bobby Live Long and Well, it would mean the world to me if you invited friends to subscribe and read with us. If you refer friends, you will receive benefits that give you special access to Dr Bobby Live Long and Well.</p><p><strong>How to participate </strong></p><p><strong>1. Share Dr Bobby Live Long and Well. </strong>When you use the referral link below, or the &#8220;Share&#8221; button on any post, you'll get credit for any new subscribers. Simply send the link in a text, email, or share it on social media with friends.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/leaderboard?&amp;utm_source=post&quot;,&quot;text&quot;:&quot;Refer a friend&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/leaderboard?&amp;utm_source=post"><span>Refer a friend</span></a></p><p>2.<strong> Earn benefits.</strong> When more friends use your referral link to subscribe, you&#8217;ll receive special benefits.</p><ul><li><p>Get Get eBook for 3 referrals</p></li><li><p>Get Zoom Chat for 5 referrals</p></li><li><p>Get Suggest topic for 25 referrals</p></li></ul><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/leaderboard?&amp;utm_source=post&quot;,&quot;text&quot;:&quot;Visit the leaderboard&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/leaderboard?&amp;utm_source=post"><span>Visit the leaderboard</span></a></p><p>To learn more, check out <a href="/__u/support.substack.com/hc/en-us/articles/16142857300372">Substack&#8217;s FAQ</a>.</p><p>Thank you for helping get the word out about Dr Bobby Live Long and Well!</p>]]></content:encoded></item><item><title><![CDATA[Stressed Out? ]]></title><description><![CDATA[Here's What Works, What's Hype, and How to Tell the Difference]]></description><link>https://drbobby.substack.com/p/stressed-out</link><guid isPermaLink="false">https://drbobby.substack.com/p/stressed-out</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Fri, 27 Mar 2026 11:55:29 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/192302313/d7539311dc7bbd0af743f6da2a2ded0e.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p>Nearly half of American adults &#8212; 49%, according to a <a href="https://news.gallup.com/poll/642704/americans-sleeping-less-stressed.aspx">2023 Gallup poll</a> &#8212; report they frequently experience stress. That number has risen 16 percentage points over the past two decades, reaching the highest level Gallup has ever recorded.</p><p>And the wellness industry is ready for you. There&#8217;s a supplement, a device, a blood test, or a program for every stressed-out soul. Ashwagandha. Cortisol curve testing. Grounding mats. $500 external vagus nerve stimulators. Adrenal fatigue protocols. The offers are endless &#8212; and so is the expense.</p><p>But here&#8217;s what they&#8217;re not telling you: most of it is hype. And the things that actually work? You&#8217;ve probably already heard of them &#8212; you&#8217;re just not doing them consistently enough.</p><p>This is an open-minded skeptic&#8217;s deep dive into stress: what it really is, how to measure it objectively, which interventions have real evidence behind them, and which ones will take your money and leave you exactly as stressed as before.</p><p>One important caveat before we begin: for some people, meaningful stress relief requires real life changes &#8212; a different job, a different relationship, a different approach to managing competing demands. A skilled therapist can help you identify and work through those root causes in ways that no supplement, gadget, or breathing exercise can. That kind of help is genuinely valuable, but it falls outside this article&#8217;s scope. What follows is focused on evidence-based self-management strategies that you can measure and test on your own.</p><h3>What Is Stress, Really?</h3><p>We usually open the stress conversation with a tiger chasing you through the African savanna. Adrenaline surges. Your sympathetic nervous system fires. You run. You survive. That&#8217;s acute stress, and it&#8217;s relatively simple.</p><p>What matters more to most of us is chronic, day-to-day stress: feeling overloaded, worn out, tense &#8212; as if life is constantly asking more of you than you can handle. And this kind of stress is maddeningly hard to define, which is part of what makes the wellness industry&#8217;s promises so seductive.</p><p>Hungarian endocrinologist Hans Selye, one of the original pioneers of stress research, captured the problem perfectly: stress is &#8220;a scientific concept which has suffered from the mixed blessing of being too well known and too little understood.&#8221; Psychologist Richard Lazarus added precision: stress occurs when the demands of a situation threaten to exceed the resources of the individual. Crucially, that&#8217;s a <strong>perception</strong>, not an objective measurement. If you believe you can&#8217;t cope, you&#8217;re stressed &#8212; regardless of what your cortisol levels say.</p><p>I got a front-row seat to this before my most recent Ironman 70.3 triathlon &#8212; at age 69. Logically, I knew I would probably finish. But the anxiety in the days leading up to the race was real: the fear of failing, of the pain and fatigue being too much, of public shame. My resting heart rate rose significantly, and my heart rate variability &#8212; a measure of how well my body&#8217;s stress systems are balancing &#8212; greatly worsened. I didn&#8217;t sleep well. The likelihood of catastrophe was small &#8212; but my perceived resources didn&#8217;t feel equal to the perceived demands. That&#8217;s stress.</p><h2>What Stress Is NOT: The Adrenal Fatigue Myth</h2><p>Here&#8217;s where the hype begins. You may have heard these phrases: &#8220;your nervous system is dysregulated,&#8221; &#8220;your cortisol is out of balance,&#8221; or &#8212; the biggest red flag of all &#8212; &#8220;you have adrenal fatigue.&#8221;</p><p>If someone tells you that you have adrenal fatigue, walk away. The Endocrine Society &#8212; the physician group that specializes in all things hormonal &#8212; is unambiguous: adrenal fatigue is not a recognized medical diagnosis. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4997656/">2016 systematic review</a> found no substantiation that adrenal fatigue is a real medical condition.</p><p>The symptoms &#8212; fatigue, brain fog, poor sleep, feeling &#8220;tired but wired&#8221; &#8212; are absolutely real. But the explanation that your adrenal glands are burned out is invented. And once that diagnosis is on the table, a practitioner can sell you saliva cortisol tests, cortisol curves, and a cascade of supplements. In <a href="https://pubmed.ncbi.nlm.nih.gov/29502560/">one study examining 12 popular &#8220;adrenal support&#8221; supplements</a>, published in Mayo Clinic Proceedings, researchers found that every single one contained undisclosed thyroid hormone, and most also contained undisclosed steroid hormones &#8212; unlabeled, unregulated, and potentially dangerous.</p><p>One important note: there <strong>is</strong> a real condition where the adrenal glands fail &#8212; Addison&#8217;s disease. It&#8217;s life-threatening, rare, and will likely send you to the emergency room. That&#8217;s not adrenal fatigue. Your doctor should also consider thyroid problems and rare tumors that can mimic stress symptoms. But these are medical conditions, not wellness diagnoses.</p><h3>How to Measure Stress Objectively</h3><p>Lord Kelvin famously said, &#8220;If you can&#8217;t measure it, you can&#8217;t improve it.&#8221; Stress is no exception &#8212; and measuring it is essential if you want to test whether anything you&#8217;re doing actually helps.</p><p>My top recommendation is the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10498818/">Perceived Stress Scale (PSS-10)</a>, a 10-question validated questionnaire used widely in research. It takes about two minutes, produces a score from 0 to 40, and is available free online. Questions include things like: <em>&#8220;In the last month, how often have you felt unable to control the important things in your life?&#8221;</em> Higher scores mean more stress.</p><p>You can supplement that with wearable data. Resting heart rate and <a href="https://humanfactors.jmir.org/2022/3/e33754">heart rate variability (HRV)</a> &#8212; measured by devices like the Oura Ring &#8212; give you additional signal. HRV tracks the beat-to-beat variation in your heart rate, influenced by vagal tone and the balance between your sympathetic and parasympathetic nervous systems. In the week before my race, my HRV greatly worsened and my resting heart rate rose significantly &#8212; consistent with my PSS scores showing elevated stress. All three measures told the same story.</p><p>As for salivary or blood cortisol: cortisol fluctuates constantly throughout the day, making it largely impractical as a personal stress tracker &#8212; and it opens the door to the upsell I described above. Save your money.</p><h3>What Actually Works: The Evidence Tier</h3><h4>Sleep &#8212; Strong Evidence</h4><p>Sleep belongs at the top of the evidence hierarchy. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8651630/">2021 meta-analysis of 65 randomized controlled trials</a> involving over 8,000 participants found that improving sleep led to significant improvements in anxiety and stress. Importantly, there was a dose-response relationship: the greater the sleep improvement, the greater the mental health benefit. If sleep is currently a problem for you, addressing it may be the single highest-leverage thing you can do. That said, if your sleep is already pretty good, squeezing out a bit more quality is unlikely to meaningfully move the needle on your stress. This is one for people where sleep is a genuine weak spot.</p><h4>Exercise &#8212; Strong Evidence</h4><p>Physical activity is one of the most robustly studied interventions in all of mental health. A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10579187/">large review of 1,039 randomized controlled trials</a> with over 128,000 participants found that exercise improved depression, anxiety, and general psychological distress &#8212; with higher intensity associated with greater benefit. The same caveat applies here as with sleep: if you&#8217;re already exercising regularly and consistently, adding more is unlikely to produce large additional stress benefits. This intervention is most powerful for those who are currently sedentary or inconsistent.</p><h4>Breathwork &#8212; Modest Evidence</h4><p>A <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9828383/">meta-analysis of 12 randomized controlled trials</a> in approximately 785 people found modest but statistically significant improvements in stress and anxiety from breathwork. The evidence isn&#8217;t dramatic, but breathwork is easy to test, free, and carries no downside. Before my race, I doubled down on five-minute breathwork sessions and found real personal benefit. Its impact on you may vary, which is exactly why measuring your response matters.</p><h4>Meditation &#8212; Good Evidence</h4><p>In a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7732708/">particularly clever study</a>, researchers used a smartphone app that randomly assigned users to meditate on a given day or not &#8212; a true randomized design. Among 343 participants, even brief meditation (sometimes as little as five minutes daily) produced measurable reductions in distress compared to controls. A <a href="https://www.sciencedirect.com/science/article/abs/pii/S0006322316000792">related study</a> found that meditators showed reductions in IL-6, a blood marker of inflammation &#8212; suggesting meditation doesn&#8217;t just calm the mind, but may also affect the biology of stress itself.</p><h4>Music Therapy &#8212; Surprising Evidence</h4><p>I&#8217;ll admit I didn&#8217;t expect much here. But a <a href="https://pubmed.ncbi.nlm.nih.gov/33176590/">meta-analysis of 47 studies involving 2,747 participants</a> found that music therapy &#8212; delivered by a trained music therapist who selects music based on the individual &#8212; produced significant improvements in stress-related symptoms, including reductions in heart rate, blood pressure, and cortisol. Whether simply listening to your favorite album delivers the same benefit is unknown. But the formal evidence is stronger than I anticipated.</p><h4>Aromatherapy &#8212; Small but Real Effect</h4><p>Another surprise: in a <a href="https://pubmed.ncbi.nlm.nih.gov/31655395/">meta-analysis of lavender and other essential oils</a> covering 65 randomized controlled trials and nearly 8,000 participants, researchers found statistically significant reductions in anxiety. The effects weren&#8217;t large. But lavender costs almost nothing, it&#8217;s harmless, and it might help. That puts it firmly in the &#8220;can&#8217;t hurt, might help, worth trying&#8221; category.</p><h3>The Hype: Where Your Money Goes to Die</h3><h4>Supplements</h4><p>The stress supplement market is enormous: ashwagandha, magnesium, L-theanine, rhodiola, kava, saffron, lion&#8217;s mane, reishi mushrooms. None have clear, convincing evidence for stress relief in humans. Take ashwagandha as a cautionary case study: there are studies suggesting possible benefit, but also evidence that it may interfere with key hormones in undesirable ways. Denmark has banned it over health concerns. And because supplements aren&#8217;t regulated, you often don&#8217;t know what you&#8217;re actually consuming &#8212; as demonstrated by the adrenal supplement study above. None of these supplement approaches has credible evidence to support their use for stress. Save your money.</p><h4>External Vagus Nerve Stimulators</h4><p>This one deserves special attention because the underlying science is genuinely interesting. The vagus nerve is the grand conductor of the autonomic nervous system, governing heart rate, breathing, digestion, and much more. There are now FDA-approved implantable vagus nerve stimulators &#8212; sophisticated devices with strong evidence for drug-resistant epilepsy, treatment-resistant depression, and remarkably, <a href="https://pubmed.ncbi.nlm.nih.gov/27382171/">even rheumatoid arthritis</a>. In a landmark study published in PNAS, vagus nerve stimulation significantly improved disease activity in RA patients &#8212; some who had failed multiple biologic treatments &#8212; by reducing inflammatory cytokine production. Nerve stimulation in the neck changed joint symptoms.</p><p>That&#8217;s genuinely exciting science. But here&#8217;s the problem: what the Instagram ads are selling you is not that. The $300&#8211;$500 external wearable devices that strap to your neck and promise to reduce stress are not the FDA-approved implantable devices, and they are not FDA-approved for stress. They follow the classic hype formula: a cool theory (help your vagus nerve!) + compelling anecdotes + credentialed-sounding endorsers. The implantable device is real medicine. The consumer gadget is not. None of these external devices has credible evidence to support their use for stress. Save your money.</p><p>The same skepticism applies to red light therapy boxes, earthing or grounding mats, detox cleanses, and IV vitamin drips. A cool theory and enthusiastic testimonials are not evidence. None of these approaches has credible evidence to support them. Save your money.</p><h3>The N-of-1 Approach: Finding What Works for You</h3><p>Even among the evidence-supported approaches, what works best varies person to person. That&#8217;s where the N-of-1 framework comes in &#8212; and stress is actually an ideal domain for it, because the outcome is measurable, the interventions are safe, and you can see results within weeks.</p><p>The protocol is simple:</p><p><strong>Step 1: </strong>Establish a baseline. Take the PSS-10 online and record your score. Note your resting heart rate and HRV if you have a tracker.</p><p><strong>Step 2: </strong>Choose one evidence-supported intervention and commit to it for one to three weeks. Don&#8217;t change multiple variables at once.</p><p><strong>Step 3: </strong>Re-measure using the same tools. Did your PSS score improve? Did your heart rate or HRV shift?</p><p><strong>Step 4: </strong>Interpret and iterate. If it helped, you have your answer. To confirm causality, stop the intervention and see if stress returns. If it does, restart. If there was no improvement, try the next approach on the evidence list.</p><p>In my case, the week before my race I doubled down on meditation and structured breathwork. My HRV and heart rate didn&#8217;t fully recover &#8212; the race stress was real &#8212; but my subjective experience of distress improved meaningfully. Meditation and breathwork are now confirmed interventions in my personal toolkit.</p><h3>The Bottom Line</h3><p>A final word on what this article doesn&#8217;t cover: for some people, chronic stress is rooted in circumstances that truly need to change &#8212; a toxic workplace, a struggling relationship, financial pressure that feels impossible to escape. No amount of breathwork or lavender will fix those. A therapist can help you navigate those deeper sources of stress, and life changes that reduce the demands on you &#8212; or increase your sense of control and resources &#8212; may ultimately do more than any self-management strategy. If that applies to you, please pursue it.</p><p>But within the domain of self-management, the evidence is clear. Stress is real, common, and rising. You can meaningfully reduce how it affects your body and mind using approaches that cost little to nothing: consistent sleep (if it&#8217;s currently poor), regular exercise (if you&#8217;re not already doing it), brief daily meditation or breathwork, and perhaps some lavender on your nightstand.</p><p>The expensive supplements, the external vagus nerve gadgets, the adrenal fatigue protocols &#8212; skip them. They&#8217;re built on cool theories and enthusiastic testimonials, not on evidence. And the practitioners selling them are not doing you any favors. Don&#8217;t stress out about which approach might help your stress. Pick one from the evidence list, measure your response, and iterate. There are ways to improve it &#8212; grounded in science &#8212; t</p>]]></content:encoded></item><item><title><![CDATA[The Million Dollar Question]]></title><description><![CDATA[Which Health Predictions Actually Help You Live Longer?]]></description><link>https://drbobby.substack.com/p/the-million-dollar-question</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-million-dollar-question</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Wed, 25 Feb 2026 12:43:35 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/189131480/57bf037aaf782ce9ad5adadd847fe711.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p>It&#8217;s a question worth billions of dollars. Companies want to sell you tests that reveal your &#8220;biological age.&#8221; Genetic tests promise to predict your dementia risk decades in advance. Your doctor calculates your 10-year probability of a heart attack. A <a href="https://www.wsj.com/personal-finance/retirement/i-tried-answering-a-big-unknown-in-retirement-planning-how-long-will-i-live-9ef468df">recent Wall Street Journal article</a> explored longevity calculators simply to figure out how much money to save for retirement &#8212; with estimates ranging from age 86 to 102, hardly a useful planning tool.</p><p>But here&#8217;s the question almost nobody is asking: <em>even if these predictions are accurate, can you actually do anything about them? </em></p><p><strong>Take the poll below and let everyone know what you think.</strong></p><p>In my latest podcast episode of <strong>Live Long and Well With Dr. Bobby</strong>, I explore this topic with Dr. Anthony Pearson, a preventive cardiologist and author of the widely-read <a href="/__u/theskepticalcardiologist.substack.com/">Skeptical Cardiologist Substack</a>. Together we examine three categories of health prediction tools &#8212; cardiac risk equations, genetic dementia testing, and biological age clocks &#8212; and ask the same hard question about each one: does knowing this actually help you live longer?</p><h3>How Risk Prediction Tools Are Built</h3><p>Before evaluating any prediction tool, it helps to understand how they&#8217;re made. Researchers start with a large database that tracks both outcomes (heart attacks, dementia, death) and clinical factors (blood pressure, cholesterol, smoking, age). They look for correlations, build a statistical equation, and &#8212; ideally &#8212; test whether improving those risk factors actually reduces bad outcomes.</p><p>That last step is critical, and it&#8217;s almost never done.</p><p>The gold standard here is the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4159698/">Framingham Heart Study</a>, launched in 1945 after Franklin Roosevelt&#8217;s death from a stroke prompted Congress to fund a major investigation into cardiovascular disease. At the time, heart attacks were considered essentially inevitable &#8212; doctors didn&#8217;t even know that high blood pressure was a cause. Framingham changed everything. By tracking thousands of residents in Framingham, Massachusetts over decades, researchers identified the now-familiar culprits: hypertension, high LDL cholesterol, smoking, diabetes, and elevated blood sugar.</p><p>Crucially, cardiac medicine went further. Clinical trials demonstrated that <em>lowering</em> those risk factors &#8212; with medication, lifestyle change, or both &#8212; actually reduced heart attacks and deaths. The prediction tool connected to a real intervention. That&#8217;s the standard every other prediction tool should be held to.</p><h3>The Best Tools Still Miss Half the People</h3><p>Even cardiac risk prediction, the most rigorous in medicine, has sobering limitations. In a <a href="https://www.jacc.org/doi/10.1016/j.jacadv.2025.102361">study published in JACC Advances</a>, researchers looked at 465 people under age 65 who had suffered a heart attack and asked whether the standard risk calculator would have flagged them in advance. The answer: half of them had been classified as low risk.</p><p>This is worth sitting with. Our best, most validated, most evidence-backed prediction tool still misses one in two younger heart attack patients. Keep that benchmark in mind as we look at less-developed tools.</p><h3>Genetic Testing for Dementia: Useful, but Incomplete</h3><p>The APOE gene comes in three variants &#8212; E2, E3, and E4 &#8212; and you carry two copies. The most common combination, E3/E3, is found in about 60% of Americans and carries a 10-15% lifetime dementia risk by age 85. The protective E2 variant roughly halves that risk. But the E4 variant is where things get serious.</p><p>One copy of E4 doubles or triples your dementia risk. Two copies &#8212; present in about 2% of the population &#8212; raises your risk to somewhere between 50 and 65% by age 85.</p><p>This is genuinely useful information &#8212; but with an important caveat. The APOE gene is not determinative. Many E4 carriers never develop dementia, and plenty of people without the gene do. And there is currently no medication or targeted therapy that changes the outcome for E4 carriers. What we do have is evidence that lifestyle factors &#8212; consistent exercise, quality sleep, blood pressure control, limiting alcohol &#8212; reduce dementia risk across the board. If knowing your APOE status motivates you to double down on those habits, the test is worth doing. If it would simply paralyze you with fear, skip it.</p><h3>Biological Age Clocks: Fascinating Science, Premature Product</h3><p>This is where the hype dramatically outpaces the evidence.</p><p>Biological age tests &#8212; measuring DNA methylation, telomere length, proteomic markers, or other indicators of cellular aging &#8212; are being marketed directly to consumers at prices ranging from a few hundred to nearly two thousand dollars (for a series of 4 during the year). The pitch is intuitive: your body may be aging faster or slower than the calendar suggests, and if we can measure that, we can fix it.</p><p>The problem is that the science doesn&#8217;t yet support these biologic clocks for routine/non-research use.</p><p>Three fundamental issues undermine today&#8217;s biological age tests. First, there is no consensus on what to measure. Different tests look at different biological processes and frequently disagree &#8212; a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9586209/">peer-reviewed reliability study</a> found results varying by as much as nine years across six different tests run on the same individuals. Your liver might appear &#8220;old,&#8221; your heart &#8220;young,&#8221; and your lungs average. What are you supposed to do with that?</p><p>Second, the tests lack reproducibility. Sending the same biological sample to the same company twice could yield results five to ten years apart. A measurement that varies that widely is not a measurement &#8212; it&#8217;s noise.</p><p>Third, and most importantly, no biological age test has ever been validated against actual health outcomes. For cardiac risk factors, we know the chain of evidence: high LDL predicts heart attacks, and lowering LDL reduces them. For biological age clocks, that chain is broken. Even if a test accurately measured your cellular age &#8212; which hasn&#8217;t been established &#8212; there is no study demonstrating that improving your score leads to longer life or better health.</p><p>No consumer-facing biological age test has been approved or validated by any regulatory body. There is no industry oversight or quality control transparency. These are, for now, research tools being sold as consumer health products.</p><h3>A Word on Where Health Information Comes From</h3><p>Before accepting any health claim at face value, it&#8217;s worth knowing this: a <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2844038">study published in JAMA Network Open</a> examined 309 health-related YouTube videos produced by doctors and found that 62% of the claims made had little or no supporting evidence. Only 20% of videos were grounded in high-quality evidence. Most striking of all &#8212; the videos with the lowest evidence scores had 35% more views. Confidence, it turns out, is more compelling than accuracy.</p><p>This is exactly why I founded Live Long and Well on a commitment to reference-backed analysis. When I hear a claim, I want you to be able to check the source yourself.</p><h3>The Bottom Line</h3><p>Prediction tools are only as valuable as what you can do with the predictions. Cardiac risk equations, for all their imperfections, connect to proven interventions. Genetic dementia testing can inform lifestyle prioritization, even without a pharmaceutical fix. Biological age clocks, despite the compelling marketing, remain scientifically premature.</p><p>My recommendation: pay attention to the risk factors that have decades of evidence behind them &#8212; blood pressure, cholesterol, blood sugar, smoking, sleep, exercise. Be skeptical of any test that costs hundreds of dollars, claims to reveal something transformative, and is sold by someone who also happens to be selling the solution.</p><p>Be an open-minded skeptic. Ask what the evidence is, not just how confident the person sounds. The two are very different things.</p><p><em>Listen to Episode 63 of Live Long and Well wherever you get your podcasts.</em></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><div class="poll-embed" data-attrs="{&quot;id&quot;:458347}" data-component-name="PollToDOM"></div><p></p>]]></content:encoded></item><item><title><![CDATA[The Allure of Alternative Medicine]]></title><description><![CDATA[Beautiful Theories, Not Much Evidence]]></description><link>https://drbobby.substack.com/p/the-allure-of-alternative-medicine</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-allure-of-alternative-medicine</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 17 Feb 2026 21:09:06 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/003b70f0-e7a1-4571-88b1-51515065465c_1418x930.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p></p><p>Listen to full podcast on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | </p><div class="subscription-widget-wrap-editor" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe&quot;,&quot;language&quot;:&quot;en&quot;}" data-component-name="SubscribeWidgetToDOM"><div class="subscription-widget show-subscribe"><div class="preamble"><p class="cta-caption">Thanks for reading bobby dubois! Subscribe for free to receive new posts and support my work.</p></div><form class="subscription-widget-subscribe"><input type="email" class="email-input" name="email" placeholder="Type your email&#8230;" tabindex="-1"><input type="submit" class="button primary" value="Subscribe"><div class="fake-input-wrapper"><div class="fake-input"></div><div class="fake-button"></div></div></form></div></div><p>You&#8217;re exhausted. Your lab results come back normal, but you feel anything but. Your doctor shrugs and suggests it&#8217;s probably stress. Frustrated and desperate for answers, you find someone different&#8212;a practitioner who actually listens, who talks about root causes and balance and healing. For the first time in months, you feel hope. But what if hope isn&#8217;t the same as help?</p><p>This scenario plays out millions of times each year across America. An estimated 11% of Americans see a chiropractor, eight million receive acupuncture, millions consult naturopaths or homeopaths, and roughly 30%&#8212;perhaps 150 million people&#8212;use some form of alternative medicine therapy, including supplements. The industry generates billions of dollars annually, fueled by compelling promises of discovering and treating the hidden root causes of chronic ailments.</p><p>The appeal is understandable. Traditional medicine often feels rushed and impersonal. Many people struggle with chronic complaints like fatigue, poor sleep, bloating, inflammation, and body aches that don&#8217;t fit neatly into conventional diagnoses. Alternative medicine providers offer something precious: time, attention, and the promise of answers. But beneath the attractive surface lies a troubling gap between beautiful theories and hard evidence.</p><h3><strong>Why the Allure Runs Deep</strong></h3><p>Alternative medicine has deep historical roots. Some herbal therapies have genuinely stood the test of time: quinine from tree bark for malaria, aspirin derived from willow bark, digitalis from foxglove for heart failure. These successes create a halo effect, suggesting that traditional botanical wisdom holds untapped cures.</p><p>But history also teaches caution. Bloodletting, leeches, and countless other &#8216;proven&#8217; remedies were eventually discredited. The key question isn&#8217;t whether some natural compounds work&#8212;we know many do. The question is whether the specific interventions being promoted today have rigorous evidence supporting them.</p><p>The real allure, though, isn&#8217;t just historical precedent. It&#8217;s the promise of a ROOT CAUSE. When you&#8217;re suffering from vague, chronic symptoms that traditional medicine can&#8217;t explain, the idea that there&#8217;s a single underlying problem&#8212;and that someone has finally identified it&#8212;is profoundly satisfying. Perhaps it&#8217;s your microbiome, or toxins in your body, or hormones out of balance, or mitochondria not functioning properly. The narrative is compelling: discover the hidden culprit, treat it, and feel better.</p><h3><strong>The Root Cause Problem</strong></h3><p>Root causes absolutely exist. Autoimmune diseases like lupus, celiac disease, and multiple sclerosis have identifiable mechanisms. True hormonal imbalances like profound hypothyroidism or Addison&#8217;s disease cause real symptoms. Toxic metal poisoning from lead overload is a genuine medical emergency. When these documented, evidence-supported root causes are identified, targeted treatment can be transformative.</p><p>But here&#8217;s the rub: these clear-cut root causes are actually quite uncommon, perhaps even rare. Despite this reality, alternative medicine practitioners often suggest that <strong>most</strong> people suffering from chronic fatigue, pain, or digestive issues likely have a discoverable root cause that they can find and fix.</p><p>The concept isn&#8217;t new. Ancient Greeks believed in the four humors&#8212;blood, yellow bile, black bile, and phlegm&#8212;and disease resulted from imbalance. A few decades ago, chronic complaints were attributed to hidden infections like Lyme disease, chronic candidiasis, or Epstein-Barr virus. We now know these weren&#8217;t the widespread causes they were claimed to be. Today&#8217;s version includes adrenal fatigue, mitochondrial dysfunction, microbiome dysbiosis, hormonal imbalance, and chronic inflammation.</p><p>The pattern repeats: beautiful theory, limited evidence.</p><h3><strong>Who Are These Providers?</strong></h3><p>The alternative medicine landscape includes diverse practitioners with vastly different training backgrounds.</p><p><strong>Homeopathy</strong> is based on 18th-century principles by Samuel Hahnemann: substances causing symptoms in healthy people could cure those symptoms in sick people when diluted repeatedly&#8212;often to the point where no molecules of the original substance remain. The theory suggests water &#8216;remembers&#8217; what was in it. To become a homeopathic provider requires no standardized medical training; weekend courses or online programs suffice. No scientific evidence supports homeopathic approaches, and there&#8217;s no biological plausibility for how it could work. The benefits observed are likely placebo effects.</p><p><strong>Naturopathic doctors</strong> follow the philosophy of vis medicatrix naturae&#8212;the healing power of nature. They believe the body has innate healing ability and that health issues should be managed through lifestyle, nutrition, and natural therapies rather than drugs. Becoming a naturopathic doctor does require training: typically four-year graduate programs with curricula including basic sciences, diagnosis, and natural therapeutics, plus about 1,200 hours of clinical training. They&#8217;re licensed in 26 U.S. states. The evidence for naturopathic medicine is mixed. Lifestyle counseling around exercise, diet, and sleep is well-supported. Some botanicals like St. John&#8217;s wort for depression have evidence. But the search for elusive root causes, skepticism toward vaccines, and sometimes recommending against traditional treatments for serious illnesses like cancer pose real risks.</p><p><strong>Functional medicine doctors</strong> represent perhaps the most visible segment today. The Institute of Functional Medicine has trained nearly 100,000 providers, though only about 2,500 have completed certification. These practitioners may be physicians but could also be chiropractors, dietitians, nurse practitioners, or health coaches. There&#8217;s no recognized certification by the American Board of Medical Specialties. Functional medicine&#8217;s stated goals are admirable: mapping complex symptoms to interrelated body systems, identifying lifestyle and environmental contributors, and serving as holistic partners rather than just medication prescribers. When genuine autoimmune diseases, infections, or toxicities are identified, the approach shines. But since these clear-cut problems are uncommon, functional medicine typically looks for other root causes&#8212;dysbiosis, adrenal fatigue, chronic inflammation, hormone imbalance, metal toxicity, mold exposure, and mitochondrial dysfunction&#8212;for which rigorous evidence is lacking.</p><h3><strong>The Cascade of Consequences</strong></h3><p>The pursuit of unlikely root causes creates a predictable cascade. First, you&#8217;ll undergo extensive testing: comprehensive blood panels costing $500, microbiome genetic sequencing of stool samples, heavy metal assessments, adrenal fatigue tests, SIBO breath testing, mold assessments, mitochondrial evaluations, food sensitivity panels&#8212;potentially several thousand dollars for a full workup.</p><p>Second, with so many tests, something will likely come back positive or borderline&#8212;a false positive. Your practitioner may declare, &#8216;Eureka, we&#8217;ve found your root cause!&#8217; But if the supposed root cause isn&#8217;t genuine, this &#8216;discovery&#8217; is simply finding noise in the data.</p><p>Third, having identified a supposed root cause, treatment follows&#8212;often without evidence. As psychologist Abraham Maslow said, &#8216;If all you have is a hammer, everything looks like a nail.&#8217; Found toxins? You need a detox program. Gut dysbiosis? Reset your microbiome with pre-, pro-, and postbiotics. Mitochondrial dysfunction? Expensive mitochondrial supplements. Adrenal fatigue? Adrenal support. These interventions have evidence for rare, specific diagnoses but not for the common complaints these doctors are treating.</p><h3><strong>A Path Forward</strong></h3><p>So what should you do if you&#8217;re suffering from chronic complaints that traditional medicine hasn&#8217;t helped?</p><p>First, recognize the kernels of truth in alternative medicine. Strong evidence supports exercise, quality sleep, good nutrition, sauna use, meditation, and robust social connections. These aren&#8217;t proprietary to alternative medicine&#8212;your traditional doctor would endorse them too&#8212;but they&#8217;re foundational to health and worth prioritizing.</p><p>Second, be an open-minded skeptic. Hope is valuable, but it&#8217;s not the same as help. Ask questions about the evidence supporting any recommended intervention. Request peer-reviewed studies, not testimonials. Be wary of anyone promising they&#8217;ve discovered a root cause that nobody else has told you about.</p><p>Third, consider seeing an alternative medicine provider as complementary to, not replacing, your traditional doctor. This gives you the benefit of their time and perspective while maintaining access to conventional medicine&#8217;s diagnostic and treatment capabilities. Think of it as a second opinion you can bring back to your primary physician.</p><p>Fourth, remember that extensive diagnostic testing and expensive supplement regimens often lack rigorous evidence. The vast majority of detox cleanses, hormone-balancing protocols, mitochondrial support supplements, and microbiome repair programs haven&#8217;t been shown to work in well-designed studies.</p><p>The allure of alternative medicine is real and understandable. When you&#8217;re suffering and conventional medicine hasn&#8217;t helped, the promise of answers is powerful. But beautiful theories require more than compelling narratives&#8212;they require evidence. Your health decisions deserve better than hope alone. They deserve interventions that have been rigorously tested and shown to work.</p><p>Be kind to yourself in your health journey. Seek providers who listen and care. But also be your own advocate by demanding evidence, questioning claims, and remembering that the most effective path to better health often lies in the unsexy basics: moving your body, sleeping well, eating nutritious food, managing stress, and maintaining strong social bonds. These aren&#8217;t secret remedies. They&#8217;re just proven ones.</p><div class="subscription-widget-wrap-editor" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe&quot;,&quot;language&quot;:&quot;en&quot;}" data-component-name="SubscribeWidgetToDOM"><div class="subscription-widget show-subscribe"><div class="preamble"><p class="cta-caption">Thanks for reading bobby dubois! Subscribe for free to receive new posts and support my work.</p></div><form class="subscription-widget-subscribe"><input type="email" class="email-input" name="email" placeholder="Type your email&#8230;" tabindex="-1"><input type="submit" class="button primary" value="Subscribe"><div class="fake-input-wrapper"><div class="fake-input"></div><div class="fake-button"></div></div></form></div></div>]]></content:encoded></item><item><title><![CDATA[GLP-1 Drugs]]></title><description><![CDATA[Life-Changing Results at an Impossible Price]]></description><link>https://drbobby.substack.com/p/glp-1-drugs</link><guid isPermaLink="false">https://drbobby.substack.com/p/glp-1-drugs</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Mon, 09 Feb 2026 12:29:09 GMT</pubDate><enclosure url="https://substack-post-media.s3.amazonaws.com/public/images/aca726fd-7242-449d-ae52-7e60ad3a56ab_458x210.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><p>What if I told you there&#8217;s a drug that treats obesity, diabetes, heart disease, sleep apnea, alcohol addiction, and possibly even Alzheimer&#8217;s? It sounds like snake oil from a late-night infomercial. Except it&#8217;s completely real.</p><p>These are GLP-1 agonist medications&#8212;drugs like Ozempic, Wegovy, and Mounjaro&#8212;and they might be the most powerful class of medications developed in decades. There&#8217;s just one problem: at current prices, using them for everyone who could benefit would cost our healthcare system $360 billion annually. That&#8217;s money we simply don&#8217;t have.</p><h3><strong>The Drugs That Changed Everything</strong></h3><p>For years as a physician, I&#8217;ve watched patients struggle with weight loss. The typical story goes like this: try every diet imaginable, lose 20 or 30 pounds, feel the overwhelming urge to eat return, and gain it all back&#8212;plus more. Some patients joke that they&#8217;ve &#8220;lost a thousand pounds&#8221; over their lifetime, but of course, they&#8217;ve also regained a thousand pounds.</p><p>I used to think this was about willpower. Eat less, exercise more, try harder. It seemed so simple.</p><p>Then GLP-1 drugs arrived, and they taught me I was completely wrong.</p><p>These medications work differently than anything we&#8217;ve had before. Yes, they help regulate blood sugar&#8212;that&#8217;s why they were initially developed for diabetics. But their weight loss effects come from three key mechanisms:</p><p>First, they slow food from leaving your stomach, creating a genuine sense of fullness. Second, they affect brain satiety centers, likely through dopamine pathways, reducing how hungry you feel. Third&#8212;and this is what patients describe as life-changing&#8212;they eliminate &#8220;food noise,&#8221; those constant thoughts about your next meal.</p><p>Patients who struggled for decades suddenly report that within days of starting these drugs, they just... stop thinking about food constantly. The cravings disappear. And the weight starts coming off.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p></p><h3><strong>The Clinical Evidence</strong></h3><p>The randomized trials are impressive. In the <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2032183">STEP trial</a>, patients weighing an average of 220 pounds lost about 15% of their body weight&#8212;roughly 35 pounds&#8212;over two years. When Eli Lilly did something almost unprecedented and compared their drug Monjaro directly to competitor Ozempic in the <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2206038">SURMOUNT trial</a> (most companies only compare to placebo because it&#8217;s easier to win), Monjaro patients lost 20% of their body weight while Ozempic patients lost 14%.</p><p>In late 2024, the FDA approved an <a href="https://www.fda.gov/news-events/press-announcements/fda-approves-first-oral-glp-1-receptor-agonist-treatment-obesity">oral version of Ozempic</a>. In the <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2409165">OASIS-1 trial</a>, patients lost about 13% of their body weight. The oral versions appear to work, though perhaps they&#8217;re one-third less powerful than the injections.</p><p>Beyond weight loss, these drugs are showing promise for conditions that may or may not be directly related to obesity. Sleep apnea and arthritis likely improve simply because patients lose significant weight. But improvements in heart attack risk and liver damage seem independent of weight loss&#8212;the drugs may have direct effects on blood vessels and inflammation. The <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2307563">SELECT trial</a> demonstrated that semaglutide reduces major cardiovascular events by 20%.</p><p>Perhaps most intriguing: a large <a href="https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2810766">Swedish population study</a> found that patients on GLP-1 drugs had 30% fewer hospitalizations for alcohol-related issues. Since these drugs reduce food cravings, they appear to reduce other cravings too.</p><h3><strong>The Reality Check: Side Effects and Discontinuation</strong></h3><p>Before we crown these as miracle drugs, we need to talk about the downsides.</p><p>The most common side effects are gastrointestinal: nausea, vomiting, diarrhea, and constipation. For most people, these improve over time&#8212;but not always. More serious risks include pancreatitis, gallbladder problems, thyroid cancer, and optic nerve damage.</p><p>The most concerning issue for nearly everyone is muscle loss. About one-third of the weight people lose may be muscle mass. If you lose 25 pounds, that could mean losing 8 pounds of muscle. This is especially problematic for older adults who are already losing muscle naturally. Anyone taking these drugs should do strength training and ensure adequate protein intake.</p><p>But here&#8217;s the biggest problem: many people quit. In real-world use (not carefully monitored clinical trials), about 65% of people taking these drugs for weight loss stop within a year. Even diabetics, who presumably have stronger motivation since it&#8217;s treating their disease, have a 47% discontinuation rate.</p><p>The reason? Side effects, cost, and the hassle of weekly injections.</p><p>And when people stop, the weight comes back. About two-thirds of lost weight returns. If you initially lost 30 to 50 pounds, you might ultimately keep off only 10 to 15 pounds&#8212;or possibly nothing at all.</p><p>For most people, these drugs represent a lifetime commitment.</p><h3><strong>The $360 Billion Question</strong></h3><p>This brings us to the economic crisis that Dr. David Rind and I discussed on my podcast. David is Chief Medical Officer at the <a href="https://icer.org/">Institute for Clinical and Economic Review (ICER)</a>, an organization that analyzes whether drug prices are fair both for individuals and society.</p><p>On an individual level, the math actually works. At current negotiated prices of $300-500 per month (down from initial prices of $500-1,000), these drugs provide good value. Using standard health economics metrics that value a year of healthy life at $100,000-150,000, the benefits&#8212;weight loss, reduced heart attacks and strokes, less diabetes, longer life&#8212;justify the cost per person.</p><p>David&#8217;s <a href="https://icer.org/assessment/obesity-2024/">analysis</a> found that these drugs are reasonably priced, which is rare for new medications in the United States. Monjaro, at newly negotiated government prices, might actually be cost-saving over a lifetime when you factor in avoided heart attacks, strokes, and other complications.</p><p>But here&#8217;s where individual math and societal math diverge catastrophically.</p><p>About 100 million Americans have a BMI of 30 or greater, qualifying them as obese. Many millions more are overweight with conditions like sleep apnea or arthritis that would make them candidates for these drugs. If we multiply even a conservative $3,600 annual cost by 100 million people, we get $360 billion per year.</p><p>Our healthcare system doesn&#8217;t have an extra $360 billion lying around. That&#8217;s why insurance companies, even though they recognize these drugs work and are fairly priced, are desperate to limit access. Without restrictions, premiums would skyrocket.</p><h3><strong>Possible Solutions</strong></h3><p>So what do we do? David suggested several creative approaches:</p><p><strong>Subscription Model</strong>: The government could guarantee pharmaceutical companies perhaps $50 billion annually each in exchange for unlimited doses. No prior authorizations, no negotiations, no sales forces. Just a guaranteed revenue stream and access for everyone who needs the drugs.</p><p><strong>Healthcare Bonds</strong>: Like any major infrastructure investment where benefits accrue over decades, the government could issue bonds specifically to fund GLP-1 access, recognizing that we&#8217;re paying upfront for long-term savings.</p><p><strong>Competition</strong>: As more drugs enter the market, prices might drop naturally. But this could take 5-10 years, leaving millions without access in the meantime.</p><p><strong>Calorie Tax</strong>: Perhaps most provocatively, we could tax the high-calorie, hyper-palatable foods that created our obesity epidemic to fund the drugs that treat it. Food manufacturers have engineered products to be almost addictive&#8212;why not make them help pay for the solution?</p><h3><strong>The Bottom Line</strong></h3><p>Are GLP-1 drugs miracles? For some patients, absolutely. They provide relief from decades of struggle in ways nothing else could. They&#8217;re teaching us that obesity is far more complex than &#8220;calories in, calories out&#8221; and that brain chemistry plays a huge role.</p><p>But they&#8217;re not perfect. They have side effects, many people quit, and the weight usually returns when you stop. They require a lifetime commitment.</p><p>And even though they&#8217;re fairly priced per person, we face an unprecedented challenge: how do we provide access to drugs that could help 100 million Americans when treating everyone would require money our healthcare system doesn&#8217;t have?</p><p>We need bold thinking. Subscription models, new financing mechanisms, calorie taxes&#8212;something beyond our current approach. Because right now, we have drugs that work remarkably well at prices that are individually fair, yet societally impossible.</p><p>That&#8217;s a problem that demands solutions as innovative as the drugs themselves.</p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/subscribe?&quot;,&quot;text&quot;:&quot;Subscribe now&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/subscribe"><span>Subscribe now</span></a></p><p class="button-wrapper" data-attrs="{&quot;url&quot;:&quot;https://drbobby.substack.com/p/glp-1-drugs?utm_source=substack&utm_medium=email&utm_content=share&action=share&quot;,&quot;text&quot;:&quot;Share&quot;,&quot;action&quot;:null,&quot;class&quot;:null}" data-component-name="ButtonCreateButton"><a class="button primary" href="/__u/drbobby.substack.com/p/glp-1-drugs?utm_source=substack&amp;utm_medium=email&amp;utm_content=share&amp;action=share"><span>Share</span></a></p><p></p><div><hr></div><h3><strong>Related Episodes:</strong></h3><ul><li><p><a href="https://drbobbylivlongandwell.com">Episode 4: Nutrition Fundamentals</a></p></li><li><p><a href="https://drbobbylivlongandwell.com">Episode 15: Weight Loss Strategies</a></p></li><li><p><a href="https://drbobbylivlongandwell.com">Episode 49: What You Eat Affects How Much You Eat</a></p></li></ul><p></p>]]></content:encoded></item><item><title><![CDATA[Over Our Skis]]></title><description><![CDATA[Watch now | How Hype Outpaces Health Evidence]]></description><link>https://drbobby.substack.com/p/over-our-skis</link><guid isPermaLink="false">https://drbobby.substack.com/p/over-our-skis</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 03 Feb 2026 13:59:59 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/186738337/098e9381fd5416b96b789dad0e671c2e.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>It&#8217;s easy to get swept up in the promise of the latest wellness trend. Maybe it&#8217;s vitamin infusions, red light therapy, or the supposed miracle of hyperbaric oxygen for fatigue. The claims sound compelling&#8212;rooted in real science, supported by a few glowing anecdotes. But when we chase what &#8220;might&#8221; help without asking whether it <em>actually</em> helps <em>us</em>, we risk stepping beyond the evidence and into false hope.</p><p>In episode #45, I take you through an honest, evidence-based look at how treatments with legitimate medical uses often get promoted far beyond what science supports. My goal? To help you become an open-minded skeptic&#8212;curious and hopeful, but unwilling to waste your time, money, or health on hype.</p><p><strong>When a Little Evidence Gets Stretched Too Far</strong></p><p>Let&#8217;s start with examples. Take <strong>vitamin C</strong>, for instance. We know it prevents scurvy&#8212;sailors in the 1600s proved that by eating citrus on long voyages. But fast-forward to the 1970s, and Nobel laureate Linus Pauling was championing vitamin C as a cold remedy. Despite public enthusiasm, rigorous research has found no clear evidence it reduces cold incidence or severity in healthy people. And, now it is being touted to improve your immune system. Again, no evidence to support this claim.</p><p><strong>Hyperbaric oxygen therapy</strong> is another prime case. This treatment is <strong>FDA-approved and highly effective</strong> for carbon monoxide poisoning, decompression sickness (for scuba divers), and healing radiation-induced tissue damage and diabetic foot ulcers. But those legitimate uses have led to much bolder&#8212;and unsupported&#8212;claims: that it cures brain fog, boosts athletic recovery, or even slows aging. The data just isn&#8217;t there, and worse, the risks include lung damage, injury to sinuses, or changes in vision, not to mention costs ranging from $200 to $1,200 per session and they may suggest that you have 3-12 sessions...</p><p>We see the same pattern with <strong>vitamin B12</strong>. For individuals with a confirmed deficiency, B12 supplementation can reverse anemia and prevent cognitive decline. But IV clinics now offer expensive injections for &#8220;immune support,&#8221; better sleep, mood, even athletic performance&#8212;despite no benefit in healthy, well-nourished individuals for hundreds of dollars. If you can eat and drink, a multivitamin and sports drink will do the trick just fine. Save your money and time!</p><p><strong>Detox therapies</strong> fall into this category too. If someone suffers from lead or mercury poisoning, chelation therapy may be lifesaving. But promoting detox cleanses as a cure for heart disease, allergies, autism, or fatigue? That&#8217;s not only unfounded&#8212;it&#8217;s misleading.</p><p>And <strong>stem cell therapy</strong>? A legitimate breakthrough in blood cancers like leukemia and lymphoma, and perhaps modestly helpful for knee pain in osteoarthritis. But clinics now sell stem cell injections for dementia, COPD, spinal cord injuries, and heart disease&#8212;all without rigorous human evidence (<a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD013342.pub2/full">Cochrane review</a>). Some treatments cost over $4,000 per session and multiple sessions might be recommended.</p><p><strong>Why We Fall for Overhyped Treatments</strong></p><p>This trend of overselling partly stems from desperation. When conventional care doesn&#8217;t offer relief, we turn elsewhere, hoping something&#8212;anything&#8212;might help. There&#8217;s also the need for &#8220;agency&#8221;- taking action <em>feels</em> good, even if it doesn&#8217;t actually help.</p><p>Then there&#8217;s the rise of <strong>Big Wellness</strong>&#8212;a booming $300 billion industry full of financial incentives, glossy marketing, and social media testimonials. Many podcasters and influencers now promote treatments they profit from, making it hard to distinguish genuine enthusiasm from cleverly disguised advertising.</p><p>And we&#8217;re vulnerable to &#8220;FOMO&#8221;. When someone says a therapy &#8220;changed their life,&#8221; we don&#8217;t want to miss out&#8212;even if the only evidence is a compelling story.</p><p><strong>How to Stay Grounded</strong></p><p>Here&#8217;s what I encourage: stay curious, but stay grounded. Ask the hard questions. Not just &#8220;Does this work?&#8221; but</p><p>-Has it been proven to work for my condition?</p><p>-Who is promoting it&#8212;and are they financially invested in it?</p><p>-What are the risks?</p><p>-What&#8217;s the cost&#8212;not just in money, but in delaying proven treatments?</p><p>Remember: a theory (like inflammation or mitochondrial dysfunction), plus an anecdote, plus an expert voice does not equal evidence. It takes <strong>rigorous, peer-reviewed studies</strong> in real people to justify bold claims.</p><p>It hurts me to see people waste time and money on treatments that don&#8217;t help&#8212;or worse, distract from what does.</p><p>If you&#8217;re ever unsure about something, bring it to me. Send questions through <a href="http://drbobbylivelongandwell.com">drbobbylivelongandwell.com</a>, and I&#8217;ll consider covering them in future articles and podcast episodes.</p><p><strong>Final Thoughts: Let&#8217;s Stay Curious&#8212;Together</strong></p><p>So let&#8217;s be open-minded skeptics. Let&#8217;s root our wellness in real human data. And let&#8217;s keep learning together&#8212;so you can live long and well, based on evidence, not hype.</p>]]></content:encoded></item><item><title><![CDATA[From Point A to Point B]]></title><description><![CDATA[5 Lessons for Building a Life You Didn't Plan]]></description><link>https://drbobby.substack.com/p/from-point-a-to-point-b</link><guid isPermaLink="false">https://drbobby.substack.com/p/from-point-a-to-point-b</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Thu, 15 Jan 2026 14:50:49 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/184661715/0a3f30dcd5cadbcee7abf101f07a5914.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p>I get asked how I became a physician-scientist, entrepreneur, Ironman triathlete, podcaster, and ranch/inn owner. Short answer: I didn&#8217;t plan most of it. Looking back, five lessons kept showing up&#8212;sometimes by design, sometimes by accident. Use them as a framework, then try the short exercises to make each lesson your own.</p><h3>1) Ask for Advice&#8212;Then Trust Yourself</h3><p>In college I was torn between medicine and business. I asked my father&#8212;an excellent physician&#8212;and he told me to choose one-he felt that it was one vs the other. I chose medicine&#8230;and then ultimately spent decades at the intersection of clinical evidence and health economics, co-founding companies designed for the win-win-win: patient, clinician, payer. He wasn&#8217;t &#8220;wrong&#8221;; he was advising from his vantage point. Your gut includes data others don&#8217;t have&#8212;your curiosity, risk tolerance, energy, and values. Seek counsel widely, and then <strong>own the final call</strong>.</p><h4>Do this:</h4><ul><li><p>Write the decision you&#8217;re wrestling with at the top of a page.</p></li><li><p>List the best arguments you&#8217;ve heard <strong>for</strong> and <strong>against</strong> each option (no more than three per side).</p></li><li><p>Now, in one sentence, capture what your gut is telling you and why. Circle it. That&#8217;s your provisional decision. Put a date next to it and commit to the next tiny action that tests it this week.</p></li></ul><h3>2) Know Your Superpower&#8212;and Your Kryptonite</h3><p>Medical training clarified that I love caring for individuals, but I&#8217;m most alive solving systems problems&#8212;how to deliver evidence-based care at scale. During my PhD I pushed to meet the dissertation requirement through peer-reviewed publications instead of a door-stop tome&#8212;faster impact, same rigor. My superpowers: cutting a clean path from A to B and translating complexity so non-experts can act. My kryptonite: day-to-day people management. Not my strong suit. Life accelerated when I built teams that complemented me. Same at the ranch: I handle function and systems; Gail, our &#8220;Chief Beauty Officer,&#8221; makes it beautiful!</p><h4>Do this:</h4><ul><li><p>Make two honest columns: <strong>What I reliably do well</strong> and <strong>What drains me / I&#8217;m not good at</strong>.</p></li><li><p>For each &#8220;not good at,&#8221; write the name of a person or resource that could cover it (a colleague, contractor, tool, or process).</p></li><li><p>Choose one task to delegate, outsource, or stop this month. Use the saved time for something squarely in your superpower.</p></li></ul><h3>3) Start with the Big Picture, Then Work Backwards in Small Steps</h3><p>In my twenties I noticed two traits that made men look older than they were: big bellies and small arms. Crude observation, but it sparked action. I began daily core and arm work to avoid a future I didn&#8217;t want. That snowballed to running, then cycling, then swimming&#8212;ultimately four full Ironman Triathlons and 15 70.3s. Today, at 69, the target shifted: durability over speed, strength for ranch life, and arriving at every start line healthy. The formula hasn&#8217;t changed&#8212;see the big picture, then reverse-engineer tiny, repeatable behaviors.</p><h4>Do this:</h4><ul><li><p>Define the 10-year picture in one sentence (health, work, relationships, or lifestyle).</p></li><li><p>Ask, &#8220;What would be obviously true of someone living that picture?&#8221; List three behaviors.</p></li><li><p>Shrink one behavior into a <strong>10-minute daily</strong> version (e.g., core routine, walk, outreach note). Track it for seven days. Adjust, then repeat.</p></li></ul><h3>4) When You Don&#8217;t Have a Vision, Take the Next Best Step</h3><p>Not everything needs a master plan. We bought Texas land for a weekend escape. Then the world shut down with COVID, we moved out full-time, built a lodge, cut trails, added exotic animals, and eventually opened a bed and breakfast-<a href="https://madronespringsranch.com">Madrone Springs Ranch</a>. There was no ten-year roadmap&#8212;just a string of sensible next steps guided by curiosity. Sometimes a telescope is useful; other times, a flashlight is enough.</p><h4>Do this:</h4><ul><li><p>Identify one &#8220;someday&#8221; curiosity you keep parking because you can&#8217;t see the end (learn a skill, start a project, explore a place).</p></li><li><p>Define the smallest irreversible step that would move it from idea to motion (one class signup, one email, one hour of tinkering, one site visit).</p></li><li><p>Schedule that step in the next seven days. After you do it, ask: &#8220;What&#8217;s the <em>next</em> best step?&#8221; Repeat.</p></li></ul><h3>5) Build Around What You&#8217;re Actually Good At</h3><p>My podcast, <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Live Long and Well</a>, is where both modes converge. Each week I see wellness claims outrun the evidence. My lane is translating rigorous research into clear, agenda-free guidance. I&#8217;m not the best researcher, fastest triathlete, or most charismatic host&#8212;but I am relentless about synthesis, clarity, and usefulness. That same mix powered the healthcare companies I helped build: align science and incentives so people can make better choices. You&#8217;ll go farther by doubling down on strengths and partnering for the rest.</p><h4>Do this:</h4><ul><li><p>Audit your week. For each recurring task, mark <strong>+</strong> if it uses your superpower, <strong>&#8211;</strong> if it doesn&#8217;t.</p></li><li><p>Choose one <strong>&#8211;</strong> task to eliminate, automate, or delegate in the next two weeks.</p></li><li><p>Choose one <strong>+</strong> activity to expand by 60&#8211;90 minutes weekly (protect it on your calendar). Revisit the audit monthly.</p></li></ul><div><hr></div><h3>Bringing it together</h3><p>The five lessons aren&#8217;t contradictory; they&#8217;re complementary. When you have a clear vision, work backward into small, consistent steps. When you don&#8217;t, take the next sensible step and let the path reveal itself. All along, know your strengths, own your gaps, and trust the data your gut is giving you. You don&#8217;t need a 30-year blueprint&#8212;you need one honest incremental step and one doable action. Progress beats perfection, every time.</p>]]></content:encoded></item><item><title><![CDATA[The Great Cold Remedy Audit]]></title><description><![CDATA[What actually works]]></description><link>https://drbobby.substack.com/p/the-great-cold-remedy-audit</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-great-cold-remedy-audit</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 06 Jan 2026 14:29:43 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/183671388/6a1f428484396bcb2d8e5506f8e816d1.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p>Got a scratchy throat or a kid sniffling on the couch? Before you stock up on &#8220;miracle&#8221; cures, let&#8217;s separate cozy folklore from what actually moves the needle. Today, I&#8217;m pairing the best clinical evidence with something many of us grew up with: Grandma&#8217;s wisdom. Where the science supports her, I&#8217;ll say so. Where it doesn&#8217;t, I&#8217;ll show you kinder, smarter swaps&#8212;so you can feel better without wasting time or money.</p><h3><strong>First, the lay of the land</strong></h3><p>Most adults get 2&#8211;3 colds a year; the typical cold lasts 5&#8211;7 days, though the cough can hang around longer. With 200+ respiratory viruses circulating (rhinovirus leads the pack), our goals are realistic: reduce risk where we can, shorten illness when possible, and treat symptoms wisely.</p><h3><strong>&#8220;Wash your hands.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;Soap and water, dear.&#8221;<br><strong>Science says:</strong> She&#8217;s right. Hand hygiene reduces respiratory infections in real-world trials, and it&#8217;s essentially zero-risk, low-cost prevention (<a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD006207.pub4/full">Cochrane</a>).</p><h3><strong>&#8220;Get your sleep.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;Everything&#8217;s worse when you&#8217;re tired.&#8221;<br><strong>Science says:</strong> Right again. In a viral-challenge study, people sleeping &lt;6 hours/night had ~4&#215; the risk of catching a cold versus &#8805;7 hours (<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4531403/">Prather et al., 2015</a>). If you do one preventive thing this season, protect your sleep.</p><h3><strong>&#8220;Bundle up before you go out.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;Cold air gives you a cold.&#8221;<br><strong>Science says:</strong> The virus, not the weather, causes colds&#8212;but Grandma wasn&#8217;t entirely off. In a foot-chilling randomized trial, the chilled group developed more colds (<a href="https://academic.oup.com/fampra/article-abstract/22/6/608/497956">study</a>). Lab data also suggest cooler nasal temperatures can blunt first-line antiviral defenses by reducing protective extracellular vesicles (<a href="https://masseyeandear.org/news/press-releases/2022/12/scientists-uncover-biological-explanation-behind-why-upper-respiratory-infections-are-more-common-in-colder-temperatures">mechanism</a>). Not definitive clinical proof, but biologically plausible&#8212;so I don&#8217;t mind a scarf on frigid days.</p><h3><strong>&#8220;Take your vitamin C.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;It keeps colds away.&#8221;<br><strong>Science says:</strong> Mixed. In 29 trials (&#8776;11,000 people), routine vitamin C did <strong>not</strong> prevent colds for the general public; however, physically stressed groups (marathoners, soldiers, skiers) saw fewer colds in subgroup analyses (<a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000980.pub4/full">Cochrane</a>). Starting vitamin C after symptoms begin doesn&#8217;t shorten illness (<a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000980.pub4/full">same review</a>). For most of us, food-first vitamin C is plenty.</p><h3><strong>&#8220;Try echinacea or garlic.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;A little nature&#8217;s medicine.&#8221;<br><strong>Science says:</strong> Echinacea hasn&#8217;t held up across randomized trials (<a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000530.pub3/full/ro">Cochrane</a>). Garlic didn&#8217;t reduce the <em>number</em> of colds in a 90-day trial (n=120), though illness seemed a bit milder with daily supplementation (<a href="https://pubmed.ncbi.nlm.nih.gov/22280901/">trial</a>). If you love garlic for food and culture, enjoy; I don&#8217;t recommend it as a daily supplement solely for colds.</p><h3><strong>&#8220;Sip chicken soup.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;It&#8217;ll help you feel better.&#8221;<br><strong>Science says:</strong> Surprisingly plausible. A classic lab study showed chicken soup slowed certain white blood cells (neutrophils), hinting at an anti-inflammatory effect; we don&#8217;t have patient RCTs, but comfort, hydration, and nourishment matter when you&#8217;re sick (<a href="https://pubmed.ncbi.nlm.nih.gov/11035691/">study</a>). Grandma keeps her crown here.</p><h3><strong>&#8220;Whisper to save your voice.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;Hush&#8212;don&#8217;t strain it.&#8221;<br><strong>Science says:</strong> Counterintuitive twist: whispering can stress vocal cords more than speaking softly for many people. Better to use a gentle, quiet voice than a whisper (<a href="https://pubmed.ncbi.nlm.nih.gov/16503476/">study</a>). Consider this a well-intended myth.</p><h3><strong>&#8220;Take something for that congestion.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;A decongestant will help you breathe.&#8221;<br><strong>Science says:</strong> Choose the right one. <strong>Oral phenylephrine</strong>, common in many combo cold meds, doesn&#8217;t beat placebo; an FDA advisory committee voted 16&#8211;0 that it&#8217;s ineffective as an oral decongestant (<a href="https://www.fda.gov/media/171915/download">FDA briefing</a>). <strong>Pseudoephedrine</strong>&#8212;the &#8220;real&#8221; Sudafed behind the pharmacy counter&#8212;does offer meaningful relief in trials (<a href="https://pubmed.ncbi.nlm.nih.gov/19230461/">evidence summary</a>). (If you have hypertension, glaucoma, prostate issues, or take certain meds, check with your clinician first.)</p><h3><strong>&#8220;A spoonful of honey before bed.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;It soothes the cough.&#8221;<br><strong>Science says:</strong> Nicely supported&#8212;<em>for kids &#8805;1 year.</em> A bedtime dose improved cough and sleep in an RCT and is backed by broader reviews (<a href="https://www.researchgate.net/publication/5790783_Effect_of_Honey_Dextromethorphan_and_No_Treatment_on_Nocturnal_Cough_and_Sleep_Quality_for_Coughing_Children_and_Their_Parents">RCT</a>, <a href="https://link.springer.com/article/10.1007/s00431-023-05066-1">systematic review</a>). Do <strong>not</strong> give honey to children under one year.</p><h3><strong>&#8220;Gargle&#8212;you&#8217;ll feel better.&#8221;</strong></h3><p><strong>Grandma&#8217;s wisdom:</strong> &#8220;Warm salt water never hurt.&#8221;<br><strong>Science says:</strong> Low-risk and maybe modestly helpful. A community trial of regular gargling (water or iodine water) showed a small signal; it won&#8217;t work miracles, but it&#8217;s fine as part of a comfort toolkit (<a href="https://pubmed.ncbi.nlm.nih.gov/16242593/">trial</a>).</p><h3><strong>What can actually shorten a cold?</strong></h3><p>Among options with reasonable evidence, <strong>zinc lozenges</strong> stand out: start within 24 hours of symptom onset and you may shave <strong>~1&#8211;2 days</strong> off illness duration. Trials often used &#8776;100 mg/day elemental zinc divided through the day for several days; metallic taste and nausea are common (<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5418896/">meta-analysis</a>). Everything else is largely about symptom relief and self-care.</p><h3><strong>My simple, evidence-and-Grandma-approved plan</strong></h3><ul><li><p><strong>Prevent:</strong> I protect <strong>sleep</strong> and I&#8217;m diligent with <strong>handwashing</strong>. On icy days, I keep my <strong>nose warm</strong>&#8212;it&#8217;s reasonable and costs nothing. I don&#8217;t rely on routine vitamin C, echinacea, or daily garlic supplements to prevent colds.</p></li><li><p><strong>Shorten:</strong> If symptoms start, I&#8217;ll <strong>start zinc lozenges early</strong> (if appropriate for me).</p></li><li><p><strong>Relieve:</strong> For congestion, I use <strong>pseudoephedrine</strong> (not oral phenylephrine). For nighttime cough in kids &#8805;1 year, <strong>honey</strong> before bed. I drink <strong>chicken soup</strong> for comfort and hydration, and I <strong>speak softly</strong> instead of whispering.</p></li></ul><h3><strong>Bottom line</strong></h3><p>Grandma got the big rocks right: wash your hands, get your sleep, keep warm, sip soup, and take honey for a cough. Modern evidence sharpens the rest: zinc helps a bit if you start it early; pseudoephedrine beats phenylephrine; and some trendy supplements don&#8217;t deliver. You have the power to make meaningful changes, one small step at a time&#8212;and sometimes those steps look a lot like what your grandmother already told you.</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!PUQl!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_424, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 424w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_848, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 848w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_1272, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 1272w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_1456, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_webp, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!PUQl!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png" width="1406" height="1076" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/afa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:1076,&quot;width&quot;:1406,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:null,&quot;alt&quot;:&quot;&quot;,&quot;title&quot;:null,&quot;type&quot;:null,&quot;href&quot;:null,&quot;belowTheFold&quot;:true,&quot;topImage&quot;:false,&quot;internalRedirect&quot;:null,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" title="" srcset="/__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_424, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 424w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_848, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 848w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_1272, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 1272w, /__u/substackcdn.com/image/fetch/$s_!PUQl!, /__u/drbobby.substack.com/w_1456, /__u/drbobby.substack.com/c_limit, /__u/drbobby.substack.com/f_auto, /__u/drbobby.substack.com/q_auto:good, /__u/drbobby.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fafa13d58-5e70-4b4a-a8e5-06d98962c5ff_1406x1076.png 1456w" sizes="100vw" loading="lazy"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[The Great Hepatitis B Vaccine Debate]]></title><description><![CDATA[What does a balanced look reveal?]]></description><link>https://drbobby.substack.com/p/the-great-hepatitis-b-vaccine-debate</link><guid isPermaLink="false">https://drbobby.substack.com/p/the-great-hepatitis-b-vaccine-debate</guid><dc:creator><![CDATA[Bobby Dubois MD, PhD]]></dc:creator><pubDate>Tue, 16 Dec 2025 12:26:58 GMT</pubDate><enclosure url="https://api.substack.com/feed/podcast/181783344/fe9874f389b7c6c74150ec82e818392b.mp3" length="0" type="audio/mpeg"/><content:encoded><![CDATA[<p>Listen on: <a href="https://podcasts.apple.com/us/podcast/live-long-and-well-with-dr-bobby/id1744023328">Apple Podcasts</a> | <a href="https://open.spotify.com/show/0we8ecOZtbUWL8moNpDdn9">Spotify</a> | <a href="https://music.amazon.com/podcasts/62361212-43dd-4170-8775-acedfe11c00f">Amazon Music</a> | <a href="https://podcastindex.org/podcast/6895856">Podcast Index</a> | <a href="https://overcast.fm/itunes1744023328">Overcast</a> | <a href="https://www.youtube.com/playlist?list=PL_05P6KHhGF7v5zwa8kz75nYrE5kraPFV">YouTube</a></p><p>You&#8217;ve just had a baby, you&#8217;re holding this tiny new human, and a nurse walk in and says, &#8220;Time for the hepatitis B vaccine.&#8221; For over 30 years, that&#8217;s been standard for almost every newborn in America. But in December 2025, a federal vaccine advisory committee voted to change this guidance, sparking confusion, concern, and debate among parents and healthcare professionals alike.</p><h3><strong>A Note on This Article</strong></h3><p>This is the first time I&#8217;ve waded into a current controversy with potential political overtones. Typically, I avoid such topics&#8212;that&#8217;s not what this podcast or blog is about. However, I felt this particular issue warranted an exception. The discussion around the hepatitis B vaccine has quickly drifted away from the actual evidence, and I&#8217;ve heard from many listeners who feel confused or overwhelmed by the headlines.</p><p>This controversy has many evidence-based elements that should be considered, which is exactly where my strength lies: reading and interpreting the scientific literature so you don&#8217;t have to. I genuinely value your feedback on whether I should tackle similar topics when they surface. Should I weigh in when health issues become politicized but still have a strong evidence base? What other topics would you like me to cover? Your input really shapes the direction of this work, so please let me know.</p><h3><strong>Why This Matters</strong></h3><p>Hepatitis B is a virus that attacks the liver, and for infants, the stakes are extraordinarily high. When babies contract hepatitis B at birth or during the first few months of life, <a href="https://www.cdc.gov/hepatitis-b/hcp/clinical-overview/index.html">approximately 90% develop lifelong chronic infection</a>&#8212;a stark contrast to the roughly 5% chronicity rate in adults. Chronic hepatitis B can lead to cirrhosis, liver failure, and liver cancer decades later, with about 25% of those infected during childhood dying prematurely from these complications.</p><p>Before universal newborn vaccination began in 1991, <a href="https://pubmed.ncbi.nlm.nih.gov/11694691/">roughly 18,000 to 20,000 U.S. children became infected every year</a>. Today, that number has plummeted to fewer than 20 annual cases among young people&#8212;<a href="https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5125a3.htm">a stunning 95-99% reduction</a>. This dramatic success story is precisely what makes the recent policy change so contentious.</p><h3><strong>What Changed?</strong></h3><p>In December 2025, the CDC&#8217;s Advisory Committee on Immunization Practices (ACIP) voted 8-3 to recommend &#8220;individual-based decision-making&#8221; for the hepatitis B birth dose. Under the new guidance, if the mother tests positive for hepatitis B or her status is unknown, the baby still gets the birth dose. However, if the mother tests negative, parents may now wait until two months for the first dose after discussing options with their doctor.</p><p>This represents a major shift away from the universal approach that has been in place for over three decades. The recommendation still requires approval from the CDC director before taking effect, and notably, the American Academy of Pediatrics has already stated they will continue recommending the birth dose for all newborns.</p><h2>A Controversial Process</h2><p>What raised eyebrows among many public health experts wasn&#8217;t just what changed, but how. The committee was reconstituted with many long-standing expert members removed and several new members added, including individuals without medical or scientific backgrounds. Some participants were known for vaccine skepticism, and their presentations didn&#8217;t always reflect scientific consensus.</p><p>Critically, there were no new safety concerns, no new adverse event signals, and no new evidence showing harm from giving newborns the vaccine. Instead, arguments centered on the current low rate of hepatitis B in U.S. infants, parental autonomy, and the belief that maternal testing alone is reliable enough to skip universal birth dosing.</p><p>CDC scientists, pediatric infectious disease experts, and public health organizations strongly disagreed. As ACIP member Dr. H. Cody Meissner stated during the proceedings, &#8220;We are doing harm by changing this wording.&#8221; Public health leaders warned that reducing coverage, even slightly, could lead to preventable infections.</p><h3><strong>Understanding the Real Risks</strong></h3><p>Some might think, &#8220;Hepatitis B is a sexually transmitted disease&#8212;why would my baby need this?&#8221; But mother-to-child transmission during birth isn&#8217;t the only risk. Young children can be exposed through bites that break the skin, open sores, contact with tiny amounts of infected blood, or shared household items like toothbrushes, razors, and nail clippers. The hepatitis B virus can survive on surfaces for up to a week, and you may not know who in your broader family or childcare circle has chronic hepatitis B. The CDC estimates that about half of the 640,000 to 1.89 million Americans with chronic hepatitis B don&#8217;t know they&#8217;re infected.</p><h3><strong>Two Key Concerns About Delaying</strong></h3><p>The first concern is infection during those first two months. While it&#8217;s a short window and the risk is low, if a baby does get infected early, the consequences are lifelong. The birth dose protects against the unexpected: a misrecorded maternal test, a missed test, or an unrecognized household exposure.</p><p>The second, larger concern is whether babies will actually get vaccinated at two months. Right now, the birth dose ensures nearly universal coverage because the baby is right there, the healthcare team is present, and there&#8217;s minimal friction. Moving the first dose to two months introduces obstacles: missed appointments, parental hesitancy, logistical challenges, and mixed messages from social media. Even today, about 9% of parents delay or skip the hepatitis B vaccine. A policy that makes delay the default will almost certainly increase the number of unvaccinated children.</p><h3><strong>Addressing Autism Concerns</strong></h3><p>Vaccine discussions inevitably raise autism concerns, and parents deserve real answers. The evidence is consistent that vaccines don&#8217;t cause autism. This conclusion is backed by numerous large studies involving hundreds of thousands of children, reviews by major scientific bodies, and research specifically examining the hepatitis B vaccine, MMR vaccine, and vaccine ingredients like thimerosal and aluminum.</p><p>Recent autism diagnoses have increased, but this is most likely due to broader diagnostic criteria, better awareness, improved screening, and environmental factors unrelated to vaccines. O The preponderance of scientific evidence finds no link between hepatitis B vaccination and autism or other neurodevelopmental disorders.</p><h2>Where the Evidence Leads</h2><p>If I were designing national policy, I would keep the universal birth dose. The vaccine is safe&#8212;there&#8217;s no new evidence suggesting otherwise. It works extraordinarily well. And most importantly, the proof is in the pudding: infant hepatitis B infections are rare precisely because the current system is simple and effective.</p><p>That said, this change isn&#8217;t catastrophic. Parents can still choose the birth dose, hospitals can still offer it, and pediatricians can still recommend it. Most babies whose mothers are hepatitis B negative remain at very low risk.</p><h2>Advice for Parents</h2><p>Know your own hepatitis B status and ensure it&#8217;s documented correctly. Strongly consider the birth dose, even if you test negative. If you decide to delay, commit absolutely to the two-month appointment. And most importantly, rely on your doctor, not social media, for guidance.</p><p>Public health works best when decisions are evidence-based. The hepatitis B birth dose is one of our most successful public health interventions. While the recommendation may be shifting, maintaining universal newborn vaccination remains the safest choice for protecting our children against a preventable disease with potentially devastating consequences.</p>]]></content:encoded></item></channel></rss>