What You’re Getting Wrong About Metabolism (And How to Fix It) with Dr. Nick Norwitz

Metabolic health is far more nuanced than conventional nutrition advice suggests. On this week’s episode of the WHOOP Podcast, WHOOP Global Head of Human Performance and Principal Scientist Dr. Kristen Holmes sits down with Metabolic Health Expert Dr. Nick Norwitz MD PhD to discuss why curiosity is one of the most powerful tools for improving long-term health. Dr. Nick Norwitz shares how a ketogenic diet unexpectedly put his inflammatory bowel disease into remission after numerous conventional treatments had failed. This experimentation sparked a career dedicated to challenging assumptions with rigorous science and thoughtful self-experimentation. Together, Dr. Nick Norwitz and Dr. Kristen Holmes unpack the difference between "evidence-based" and truly individualized care. This episode continues to explore why muscle, sleep, and visceral fat play central roles in brain, heart, and metabolic health. From discussions on protein, the microbiome, and emerging therapies to Nick's famous Oreo-versus-statin experiment, the conversation encourages listeners to move beyond one-size-fits-all health advice, and partner with their healthcare providers to embrace safe, data-informed experimentation for a better understanding of their biology. Shownotes:(00:00) Trailer Intro(00:43) Who Is Dr. Nick Norwitz?(03:07) Nick’s Personal Health Journey(08:29) Nutrition as a Medical Intervention(12:41) What Does “Evidence-Based” Care Really Mean?(16:42) The Key to Optimizing Your Health(19:17) Debunking Metabolic Health Myths(20:46) The Benefits of Training and Exercise(26:29) How Metabolism Affects Strength, Cardio, and Brain Health(30:03) How Does Sleep Impact Inflammation?(32:35) GLP-1s and Your Metabolism: What’s Really Happening?(34:47) Nick’s Take on Self-Experimentation(35:43) The Oreo vs. Statin Study(45:19) How to Burn Fat(49:43) Do We Really Need to Focus on Protein?(51:25) What Is Visceral Fat—and How Do You Lose It?(56:08) Why You Should Stay Curious About Your HealthResources:Fitness and aging (Nature Aging 2026); https://www.nature.com/articles/s43587-026-01150-x  Visceral fat and resistant starch: (Nature Metabolism 2024): https://www.nature.com/articles/s42255-024-00988-y Visceral fat and resistant starch, **YouTube Breakdown: https://youtu.be/wnEApLnKDRI   Visceral fat and brain volume: (Nature Comm 2026): https://www.nature.com/articles/s41467-026-71141-4 Leg power and longevity (twin study): https://pubmed.ncbi.nlm.nih.gov/26551663/ 600-calorie exercise burn study (Nature Metabolism 2025): https://www.nature.com/articles/s42255-025-01236-7 Microbiome and beige fat study (Nature 2026): https://www.nature.com/articles/s41586-026-10205-3 Oreo versus statin study: https://pubmed.ncbi.nlm.nih.gov/38276308/Follow Nick Norwitz:WebsiteYouTubeInstagramXLinkedInSubstackSupport the showFollow WHOOP:Sign up for WHOOP Advanced LabsTrial WHOOP for Freewww.whoop.comInstagramTikTokYouTubeXFacebookLinkedInFollow Will Ahmed:InstagramXLinkedInFollow Kristen Holmes:InstagramLinkedInBuy Aligned by Dr. Kristen Holmes: Follow Emily Capodilupo:LinkedIn