The Gut Insiders
Dr. Will Bulsiewicz
Better health begins in your gut. But medicine isn't "one size fits all," and your gut microbiome is as distinct as your fingerprint.
Board-certified gastroenterologist and New York Times bestselling author Dr. Will Bulsiewicz is on a mission to help you feel better through cutting-edge science and two decades of clinical expertise that will make you think differently about the food you eat — and the trillions of hungry organisms living in your colon.
Join Dr. B and co-host Chuck Carroll for gut-first discussions about diet, exercise, sleep, stress, trauma, and your health questions.
Board-certified gastroenterologist and New York Times bestselling author Dr. Will Bulsiewicz is on a mission to help you feel better through cutting-edge science and two decades of clinical expertise that will make you think differently about the food you eat — and the trillions of hungry organisms living in your colon.
Join Dr. B and co-host Chuck Carroll for gut-first discussions about diet, exercise, sleep, stress, trauma, and your health questions.
Episodes
Mentioned books
Mar 23, 2026 • 20min
Collagen and Your Gut Health: What Does the Science Actually Say?
They debate whether collagen supplements actually affect gut health and review the limited human trials. They contrast protein fermentation and harmful byproducts with how prebiotic fiber produces protective short-chain fatty acids. They cover animal and cell studies, proposed mechanisms for both collagen and fiber, and a simulated-colon trial comparing outcomes.
Mar 16, 2026 • 55min
05 Colon Cancer: The Disturbing Trend I See In My Patients
Rising colorectal cancer rates in younger adults and why fit people can still develop dangerous polyps. How ultra-processed foods, low fiber and processed meat may drive risk. The role of alcohol, poor sleep, stress and circadian disruption in gut health. Why fiber, regular exercise and timely screening matter for prevention.
Mar 9, 2026 • 14min
Science Says Coffee Is Amazing For Your Health. Here's What It Does Inside Your Gut.
They break down the compounds in coffee that reach the colon, like soluble fiber, polyphenols, and melanotins. They discuss how those molecules feed microbes and boost butyrate-producing bacteria. They cover large studies linking coffee to microbiome shifts and disease risk reduction. They explain timing, optimal intake, decaf benefits, and who might need to avoid or limit coffee.
Mar 2, 2026 • 57min
04 Make These 4 Changes to Your Sleep Routine Right Now 🌙
They explain how nights switch the body from performance to repair and why that matters for gut health. Melatonin is framed as a gut hormone with receptors in the GI tract. Light, late eating, alcohol, and stress are called out as nightly saboteurs. Four simple evening rules are offered: dim light, slow down, stop late eating, and keep consistent timing.
Mar 1, 2026 • 16min
5 Ways to Protect Your Gut Microbiome From Chronic Stress
They unpack the brain-gut connection and how stress physically disrupts digestion. They outline how stress hormones and nervous system shifts change gut motility, barrier function, and microbiome composition. They present five practical strategies like regular meal timing, gratitude walks, sleep hygiene, diaphragmatic breathing, and avoiding alcohol and ultra-processed foods to protect gut health.
Feb 26, 2026 • 15min
This Study Changed My Relationship With Alcohol Forever
A reframe of alcohol as a gut, not just a liver, issue. How alcohol weakens the gut barrier, alters the microbiome, and raises blood endotoxin levels after even one binge. Why hangovers are driven by inflammation from gut injury. Evidence that abstinence restores gut health and mood. Practical tips on drinking less harmfully and getting polyphenols without ethanol.
21 snips
Feb 9, 2026 • 54min
03 The Gut Clock ⏰ How Your Morning Routine Shapes Gut Health, Energy, and Inflammation
Dr. Will Bulsiewicz, a board-certified gastroenterologist and bestselling author known for gut and microbiome science, explains how your morning programs digestion, immunity, and energy. He covers circadian rhythm effects on hormones and microbes. He highlights morning light, gentle movement, timing of coffee, and early fiber as key levers to set your gut clock.
Feb 2, 2026 • 11min
Why Fiber Makes You Bloated (and How to Fix It)
If you’ve ever tried to eat healthier, added more plants, more fiber, and ended up bloated, uncomfortable, or frustrated…this video is for you.Fiber is one of the most powerful tools we have for human health. But here’s the paradox:The thing that’s supposed to heal your gut is the thing that’s making you feel worse. And that leads a lot of people to give up on fiber altogether. That’s an understandable reaction — but it’s the wrong conclusion. Let's fix that!Find more great info here on The Gut Insiders podcast, "The Science of Farts" https://www.youtube.com/watch?v=QIlpJh_0ESYDr. B's new book, "Plant Powered Plus," is available now: https://www.amazon.com/Plant-Powered-Plus-Activate-Inflammation/dp/B0FNDSR2C5Subscribe to The Gut Insiders wherever you get your podcasts:🍎 https://apple.co/4qqHK33🟢 https://bit.ly/4q93399Follow Dr. B on Instagram: https://www.instagram.com/theguthealthmd/Learn more about the evidence-based gut health formulas in 38TERA: https://38tera.com
Jan 26, 2026 • 16min
4 Habits to Keep Your Gut Microbiome Strong When Taking Antibiotics
Discussion of how antibiotics reshape the gut microbiome and which changes can linger. Practical strategies to protect and recover gut diversity using fiber, targeted prebiotics, and lifestyle habits. Updated guidance on when to use probiotics and the role of Saccharomyces boulardii for high-risk situations.
Jan 19, 2026 • 14min
The Silent Disease Lurking In Young, Healthy People: What I've Learned After 9,000 Colonoscopies
Between 2010 and 2022, during my years in gastroenterology fellowship and clinical practice, I personally performed nearly 9,000 colonoscopies. That’s 9,000 times looking directly at the inside of the human colon. 9,000 chances to notice patterns that most people never hear about.What I want to share today isn’t meant to scare you. It’s meant to inform you. And, ultimately, to empower you.Dr. B's new book, "Plant Powered Plus," is available now: https://www.amazon.com/Plant-Powered-Plus-Activate-Inflammation/dp/B0FNDSR2C5Subscribe to The Gut Insiders wherever you get your podcasts:🍎 https://apple.co/4qqHK33🟢 https://bit.ly/4q93399Follow Dr. B on Instagram: https://www.instagram.com/theguthealthmd/Learn more about the evidence-based gut health formulas in 38TERA: https://38tera.comPeer reviewed studies cited in this video:▶ https://acsjournals.onlinelibrary.wiley.com/doi/10.3322/caac.21601▶ https://academic.oup.com/jnci/article/109/8/djw322/3053481?login=false▶ https://www.acpjournals.org/doi/10.7326/0003-4819-150-1-200901060-00306▶ https://pmc.ncbi.nlm.nih.gov/articles/PMC9036624/▶ https://pubmed.ncbi.nlm.nih.gov/19765672/
