The Real Health Podcast

Imagine helping your body recycle its own damaged mitochondria. Dr. Barrett breaks down urolithin A - a molecule produced when your gut microbiome interacts with foods like raspberries, strawberries, and pomegranates (though only about 40% of people naturally produce it). He walks through the research: improved muscle endurance and leg strength in older adults, VO2 max gains in competitive runners, reduced inflammation, stronger immune cell function, and even memory improvements from a brand-new October 2026 study. He closes with dosing guidance, where to source it, and why gut health is still the real foundation underneath it all.
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We usually hear about how the brain affects the gut, but Dr. Barrett flips the script to explain how your gut directly shapes your brain. He breaks down the enteric nervous system (your “second brain”), the vagus nerve as a two-way communication highway, and why 90-95% of your serotonin is actually produced in your gut. He covers five ways an unhealthy gut can drive anxiety, depression, and brain fog, then closes with five practical strategies to repair the gut-brain connection… plus his top pick for a gut-optimizing supplement: butyric acid.
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More isn’t always better when it comes to fasting. Dr. Barrett breaks down what actually happens in your body across different fast durations — from the first 12 hours through deep ketosis and autophagy at 72+ hours - and introduces a 5-factor framework (metabolic health, nutritional reserves, stress/sleep, muscle mass, and medical considerations) to help you decide if you’ve actually earned the right to fast longer. He covers who’s a good fit for a 24-hour vs. 3-day vs. 5-day fast, why sodium matters more the longer you go, and - critically - how to break a fast properly without wrecking the benefits.
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Fat has gone from public enemy #1 to the darling of the wellness world - but the truth is more nuanced than either camp admits. Dr. Barrett breaks down the two essential fats (omega-3 and omega-6), why your body needs fat for brain health, cell structure, hormone production, and vitamin absorption, and tackles the seed oil debate head-on. He covers why extra virgin olive oil is the strongest dietary fat for longevity, why saturated fat response is genetic, and introduces C15 - an emerging longevity fatty acid - before closing with six practical rules for eating fat well.
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Carbs make you fat. Carbs are essential. Keto is the answer. No, plants are the answer. Dr. Barrett cuts through the noise and breaks down carbohydrates... the good (energy, gut health, brain function, micronutrients), the bad (modern processed carbs and insulin resistance), and a practical green/yellow/red-light hierarchy for choosing sources. He closes with specific carb targets based on activity level, from sedentary adults to competitive athletes, built around one simple rule: earn your carbs.
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Is caffeine good for you, bad for you, or somewhere in between? Dr. Barrett breaks down everything you need to know - starting with four common myths (that caffeine gives you energy, that coffee dehydrates you, that it's bad for your heart, and that you can drink it at night with no consequences). He covers ideal dosing, why timing matters more than amount, his personal hierarchy of caffeine sources, what the research says about coffee and tea's longevity benefits, whether caffeine is safe for kids, and five practical rules for using caffeine well.
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Why does your body start to feel different around 35? Dr. Barrett breaks it down for both men and women in under 15 minutes. For men: declining total and free testosterone, insulin resistance, and slower recovery capacity - plus what to fix before jumping to TRT. For women: functional iron deficiency (even with "normal" labs), muscle loss, and cardiovascular markers like ApoB and homocysteine that often get missed. Practical, no-fluff strategies throughout.
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Normal labs don't always mean nothing is changing. In this episode, Dr. Barrett walks through seven early signs that a woman's hormones are shifting - often years before a standard lab panel catches it. Geared toward women in their mid-30s to 50s, he covers changes in cycle length, sleep disruption, PMS symptoms, anxiety and stress tolerance, body composition, libido, and exercise recovery - plus practical, nutrition-first recommendations (protein, targeted supplements like maca root and DIM, and testing labs while you're still feeling your best) for each one.
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For decades, "high cholesterol" has been treated as a diagnosis in itself - but Dr. Barrett breaks down why that's outdated thinking. Using advanced lab markers now available through services like Function Health, he walks through five common cholesterol myths: that high cholesterol equals heart disease, that LDL-C tells the whole story, that high HDL is automatically protective, that diet alone drives your LDL levels, and that a normal total cholesterol means low risk. He explains where ApoB, LPA, and insulin resistance fit into a modern cardiovascular risk model - and the three tests he recommends everyone over 30 get checked.
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Forget the scale - it doesn't tell you what actually predicts longevity. In this episode, Dr. Barrett walks through a 5-part scorecard you can start tracking from home: waist-to-height ratio, grip strength, metabolic markers (glucose, insulin, A1C), VO2 max, and sleep quality. He breaks down the research behind each one and why these fundamentals matter more than any supplement stack, peptide, or hormone protocol - plus simple, practical ways to start improving your score today.
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Watch the episode on YouTube here!

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