The Mind-Gut Conversation Podcast

Peptides are everywhere right now — on social media, in wellness clinics, and in the claims of biohackers promising faster healing, sharper thinking, and slower aging. But how much of this is science, and how much is hype?In this episode of The Mind-Gut Conversation, Dr. Emeran Mayer draws on decades of peptide research — including his early work on gut peptides at UCLA — to explore what these molecules actually are, how they work, and why the gap between promising lab results and proven human medicine is so often overlooked.From insulin and GLP-1 to BPC-157 and beyond, Dr. Mayer examines why some peptides have transformed modern medicine after decades of rigorous research, while others promoted online today exist in a scientific gray zone — lacking human trials, standardized dosing, and long-term safety data.This episode offers a grounded, evidence-based framework for thinking critically about peptide claims, and a reminder that the most powerful tools for health may not be the most exciting ones.Topics discussed include:What peptides are and how the body already uses themWhy some peptides have transformed medicine — and how long it actually tookThe science and limitations behind popular peptides like BPC-157Why what works in animals doesn't always work in humansThe risks of unregulated peptide use and compounding pharmaciesWhere legitimate peptide research is headedThis is a thoughtful, science-driven discussion for anyone navigating the growing world of peptide therapy and longevity medicine.----------------------------------------------------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.x.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/----------------------------------------------------------------------Chapters:0:00 - Introduction0:42 - What Are Peptides?2:25 - How Peptides Already Transform Medicine3:30 - The New Wave of Unproven Peptides4:42 - Why Scientists Are Cautious7:02 - Peptides Worth Watching7:45 - The Bigger Pattern in Wellness Culture8:30 - Closing Thoughts

Eating for your microbiome doesn't have to be complicated — but it does require rethinking how we approach food, carbohydrates, and flavor. In this episode of The Mind–Gut Conversation, Dr. Mayer is joined by Anu Simh, a board-certified functional health coach, microbiome educator, and author of Flourish from Within: New Gut for Lifelong Health. Anu's work bridges the gap between microbiome science and real-world application, offering a framework for eating that supports microbial diversity without rigid meal plans or overwhelming recipes.They explore why diversity matters more than any single superfood, how to distinguish beneficial complex carbohydrates from refined ones, and why traditional cuisines — like Anu's South Indian roots — have been quietly aligned with microbiome science all along. The conversation also covers the role of herbs and spices as important sources of polyphenols, how to retrain your palate to accept bitter flavors, and how to build simple, repeatable eating patterns that actually stick in people's lives. This episode offers a grounded, science-based look at what it means to feed your microbiome, and how to translate research into sustainable habits that support gut health and long-term well-being.Topics discussed include:• Why microbial diversity is more important than any single superfood• How traditional cuisines align with microbiome science• The difference between refined and complex carbohydrates• Herbs and spices as polyphenol-rich additions to everyday meals• Retraining your palate to accept bitter and diverse flavors• Building simple, repeatable eating patterns for gut healthThis is a practical, science-driven discussion for anyone interested in the gut microbiome, plant-forward eating, and the brain–gut connection.Chapters:0:00 - Introduction2:36 - Anu's Origin Story and Journey to Microbiome Science8:46 - Has Plant-Forward Eating Reached the General Public?25:08 - The Flourish Diet34:54 - Herbs, Spices, and Retraining Your Plate45:07 - Closing Remarks and Practical Recipes

Fiber has been talked about for decades — but emerging research suggests most of us still don't understand what it actually does, how much we need, or why the modern diet has left us so dramatically short of it.In this episode of The Mind–Gut Conversation, Dr. Mayer is joined by Dr. Matt Amicucci, food scientist and co-founder of OneBio, to discuss the cutting-edge science of dietary fiber and its far-reaching role in gut health, metabolism, and disease prevention.Dr. Amicucci explains how different fiber structures interact with specific microbial communities in the gut to produce short-chain fatty acids like butyrate — and how those molecules influence everything from blood glucose regulation to GLP-1 secretion to long-term mortality risk. He also shares the story behind Glycopedia, the largest dietary fiber database ever built, and how it is being used to develop a new generation of personalized, microbiome-targeted nutrition.They also discuss why 95% of Americans fall short of even the minimum recommended fiber intake, how decades of food processing have systematically stripped fiber from the diet, and what it will take to close that gap.This is a practical, science-driven discussion for anyone interested in nutrition, the gut microbiome, and the future of food.--------------------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.twitter.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/--------------------------------------Chapters:0:00 - Introduction2:38 - Matt's Origin Story: From Chef to Food Scientist6:43 - Why Fiber Is Having a Moment8:58 - The Fiber Deficit Crisis11:36 - What Decades of Low Fiber Intake Has Done to the Microbiome13:47 - Building Glycopedia: Mapping the World's Fibers19:33 - Why Whole Foods Alone Aren't Enough21:42 - Not All Fiber Is Created Equal25:47 - Introducing GoodVice27:34 - The Health Case for 10 More Grams a Day33:49 - Rethinking Sugar and Fiber Together36:34 - Fiber, Butyrate, and GLP-138:42 - The Future of Personalized Fiber Nutrition40:17 - What's Next for OneBio

Chronic pain is often treated as a problem to suppress with medication or surgery, but what if it’s actually a signal from a complex system that needs to be addressed holistically?In this episode of The Mind–Gut Conversation, Dr. Mayer is joined by Jared E. Katz, author of Retrain the Brain: Self-Help for Traumatic Brain Injury and creator of the pain management app Painless. Jared’s story begins more than twenty years ago, when a traumatic brain injury left him with cognitive impairment and two rare, painful conditions: Chiari malformation and syringomyelia.Rather than accepting a life defined by pain, Jared spent years quietly experimenting with how he eats,sleeps, moves, and thinks. He developed what he calls a “brain health algorithm” — a set of daily practices spanning nutrition, cognitive activity, movement, sleep, and social engagement. The result is not just a book, but a blueprint for anyone living with chronic pain or seeking to understand whatbrain health truly looks like in practice.This episode is slightly different from our usual focus on the gut microbiome, but the principles align closely with the holistic, systems-based thinking Dr. Mayer teaches. Jared’s experience demonstrates that the brain is not a machine with one broken part — it’s a dynamic, interconnected system capable of adaptation and healing when given the right conditions.Topics discussed include:• What a “brain health lifestyle” actually involves• How anti-inflammatory nutrition and eating patterns affectpain and cognition• Why chronic pain requires addressing multiple systems, notjust one symptom• How cognitive exercises like writing can help rewire thebrain• The future of personalized pain managementThis is a practical, deeply human conversation for anyoneinterested in chronic pain, brain health, and the power of self-directed healing.Chapters:0:00 - Introduction6:04 - Jared's Story: The Injury & Living With Chronic Pain11:30 - Nutrition, Diet & the WAH Principle16:57 - The Painless App & the Future of Pain Management22:30 - The Five Pillars of a Brain Health Lifestyle27:48 - Resilience, Recovery & the Gut-Brain Connection35:11 - Psychedelics, Neuroplasticity & Closing Thoughts

Menopause is often described as a simple decline in estrogen production, but emerging microbiome research suggests the story is far more complex.In this episode of The Mind–Gut Conversation, Dr. Mayer is joined by Dr. David Meriwether, a scientist at UCLA’s Goodman Luskin Microbiome Center, to discuss the estrobolome — a specialized group of gut microbes that recycle and reactivate estrogen after it has been excreted by the body.They explore how gut microbes may contribute to circulating estrogen levels even after menopause, why menopausal symptoms vary so widely among women, and how changes in the microbiome may create feedback loops that influence symptom severity. The discussion also places this research in the broader context of recent findings published in Nature linking the gut microbiome to health, aging, and disease.This episode offers an in-depth, evidence-based look at a new biological framework for understanding menopause, and the potential for future non-hormonal strategies rooted in the brain–gut–microbiome system.Topics discussed include:• What the estrobolome is and why it matters• How gut microbes recycle estrogen after menopause• Why some women experience fewer menopausal symptoms than others• The interaction between the gut, hormones, and aging• Where microbiome-based therapies for menopause may be headedThis is a practical, science-driven discussion for anyone interested in women’s health, menopause, and the evolving role of the gut microbiome.You can support & learn more about Dr. Meriwether's work here: https://themeriwetherlab.com/-------------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.twitter.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/

In this episode of The Mind–Gut Conversation, Dr. Emeran Mayer sits down with Tim Spector, MD, to discuss the implications of a landmark gut microbiome study involving more than 34,000 participants — one of the largest and most comprehensive efforts to date to understand what a “healthy” gut microbiome actually looks like.Drawing from the study’s novel design and findings, they explore why defining gut health is far more complex than identifying a short list of “good” or “bad” microbes. The conversation unpacks what large-scale microbiome data can, and cannot tell us about health, disease prevention, and the growing interest in microbiome testing as a tool for personalized nutrition and healthcare.Together, they examine the deep connections between diet and the microbiome, highlighting why dietary patterns, particularly fiber- and prebiotic-rich foods, may play a more meaningful role than many commonly marketed probiotic products. They also discuss the challenges of translating microbiome research into actionable guidance for consumers and clinicians, and why education and context are essential as microbiome testing becomes more widely available.This wide-ranging discussion blends cutting-edge microbiome science with practical insight, offering a grounded perspective on where the field is headed and how emerging research may eventually shape everyday health decisions.Topics discussed include:• What a large-scale microbiome study reveals about gut health• Why defining a “healthy” microbiome is more complex than expected• The limitations of labeling microbes as simply good or bad• The role of diet, fiber, and prebiotics in shaping the microbiome• The promises and pitfalls of microbiome testing• How microbiome research may influence future healthcare practicesThis is a practical, evidence-based discussion for anyone interested in gut health, whether navigating dietary choices personally, exploring microbiome testing, or working in a clinical or research setting.Please leave any comments or feedback on the episode — we’d love to hear your thoughts.-------------------------------Chapters:00:00 Introduction02:05 The Landmark Study Overview05:29 Defining Healthy Gut Microbiomes10:02 The Good vs. Bad Microbes13:59 Implications for Diet and Health18:37 The Role of Prebiotics and Probiotics23:27 Future Directions in Microbiome Research27:49 Challenges in Proving Causality31:51 The Future of Gut Health Testing36:36 Future Outlook in Traditional Medicine40:10 Microbiome Testing in Clinical Practice43:20 Regulation, Wellness, and Medical Use46:10 Personalizing Diet Through the Microbiome48:50 Final Reflections

In this episode of The Mind–Gut Conversation, Dr. Emeran Mayer sits down with Will Bulsiewicz, board-certified gastroenterologist, New York Times bestselling author, and one of today’s leading voices in microbiome science.Drawing from his newest book, Plant-Powered Plus, Dr. Bulsiewicz explores why chronic, low-grade immune activation has become so widespread—and how modern lifestyles are keeping our immune system permanently switched on.Together, they examine the deep connections between diet, the microbiome, the immune system, and inflammation, unpacking how evolutionary mismatches, ultra-processed foods, low fiber intake, chronic stress, and social disconnection are reshaping human health. The conversation moves beyond symptoms to address root causes, highlighting why restoring health requires rethinking how we eat, live, and connect.This wide-ranging discussion blends cutting-edge science with clinical insight, offering a grounded, practical perspective on how small, sustainable changes can meaningfully reduce inflammation and support long-term well-being.Topics discussed include:• What inflammation really is—and why it’s no longer just an acute response• How the gut microbiome and immune system interact• The role of fiber, polyphenols, and microbial metabolites in regulating inflammation• Why modern environments clash with human biology• How lifestyle factors like stress, loneliness, and purpose influence immune healthThis is a practical, evidence-based discussion for anyone seeking to understand how modern lifestyle factors shape immune health, inflammation, and long-term well-being.Please leave any comments or feedback on the episode — we’d love to hear your thoughts.----------------------------This episode is brought to you by Mayer Nutrition. If you are interested in trying Synaptic Bloom, our high-potency Quercetin + supporting polyphenols blend, you can visit mayernutrition.com, and use our exclusive podcast discount code: MINDGUT for 10% off your first order!----------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.twitter.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/----------------------------Chapters:0:00 – Introduction 3:00 – Purpose, Medicine, and the Evolution of Gut Health 7:00 – What Inflammation Really Is 12:30 – Modern Life and the Immune System 18:00 – The Gut Microbiome and Immune Activation 26:00 – Diet, Fiber, and Microbial Health 38:21 – Mayer Nutrition40:15 – Lifestyle, Stress, and Social Connection 49:00 – Technology, Medicine, and the Future of Health 1:05:00 – Practical Takeaways and Closing Reflections

In this episode of The Mind-Gut Conversation, Dr. Emeran Mayer sits down with Dr. Lauren DeDecker, a board-certified internal medicine physician with training in nutrition and integrative medicine, to explain how gut health is approached in real-world primary care.They discuss why fiber and plant diversity remain foundational for digestive and metabolic health, how microbiome research reshaped modern medicine, and why popular diet trends often miss the bigger picture. The conversation also covers SIBO, common gut-related diagnoses, and how GLP-1 medications are changing what we understand about appetite, inflammation, and metabolism.Key Topics Covered:• Gut health and the brain-gut-microbiome system• Fiber, fermented foods, and microbiome diversity• SIBO, overdiagnosis, and gut symptoms• Popular diets: carnivore, keto, Mediterranean• GLP-1 medications, appetite regulation, and inflammationThis is a practical, evidence-based discussion for anyone interested in supporting gut health — whether navigating digestive concerns personally or working with patients in a clinical setting.Please leave any comments or feedback on the episode — we’d love to hear your thoughts.----------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.twitter.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/-----------------------------Chapters:0:00 – Introduction to Gut Health & Integrative Medicine1:30 – From Conventional Medicine to Integrative Care6:30 – Why Gut Health Became Mainstream (Microbiome Science)12:30 – Fiber, Plant Diversity & Foundational Gut Health18:45 – Diet Trends Explained: Carnivore, Keto & Mediterranean22:30 – SIBO, Gut Symptoms & Overdiagnosis31:45 – GLP-1 Medications, Appetite & Metabolism41:15 – The Future of Gut Health & Lifestyle Medicine

In this episode of The Mind-Gut Conversation, Dr. Emeran Mayer sits down with Wolfgang Puck, one of the most iconic chefs of our time, for an intimate conversation about the life experiences, creative influences, and personal philosophy that shaped his extraordinary career.Puck reflects on his difficult childhood in Austria and how the kitchen became both refuge and calling. He shares the pivotal moments — working under a visionary French chef, discovering the power of simple dishes made from exceptional ingredients, and redefining California cuisine — that built the foundation of his global culinary empire.Together, they explore:• How early adversity shaped Puck’s resilience and drive• The pivotal mentor who transformed his relationship to flavor and hospitality• Why simplicity, curiosity, and world-class ingredients remain his guiding principles• The evolution of American dining and why taste is central to healthier eating• How passion, purpose, and creativity fuel energy and longevity well into his 70sThis conversation reveals the mindset behind a cultural icon — one who continues to innovate, inspire, and live fully through his craft.----------------------------Connect with Dr. Mayer:Website: https://www.emeranmayer.comInstagram: https://www.instagram.com/emeranmayer/X (Twitter): https://www.twitter.com/emeranmayermdFacebook: https://www.facebook.com/EmeranMayerMD/LinkedIn: https://www.linkedin.com/in/emeranmayer/Chapters:00:00 – Early Hardship & Discovering the Kitchen08:40 – Mentorship in France & Shaping a Culinary Philosophy14:00 – Coming to America: Reinvention in New York & LA23:20 – Creating California Cuisine & Building Spago31:30 – Flavor, Health, and the Future of Eating49:50 – Passion, Curiosity & Longevity

Join Kate Scarlata, a leading dietitian and bestselling author specializing in IBS and digestive health, as she dives deep into gut wellness. She shares her personal journey through gastrointestinal challenges and how it shaped her career. Discover why the Low FODMAP diet is not a one-size-fits-all solution and learn about the nuances of SIBO diagnosis. Kate also uncovers the complexities of gluten sensitivity and the various causes of bloating beyond diet. Plus, find out why detox diets are more myth than miracle!