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Will Bulsiewicz

Dr. Will Bulsiewicz is a gastroenterologist and gut health expert who has pioneered groundbreaking research on the microbiome's role in overall wellness and disease prevention. Through his podcast appearances and clinical work, he reveals how critical nutrition—particularly fiber, polyphenols, and fermented foods—can dramatically reduce inflammation and transform health at the cellular level. His insights extend beyond traditional medical advice, offering practical strategies for everyday people to optimize their diet, protect their gut barrier, and potentially prevent over 130 chronic health conditions. As an author and speaker, Bulsiewicz translates complex medical science into actionable lifestyle recommendations that challenge conventional dietary thinking and empower individuals to take control of their metabolic health.

5episodes
4podcasts

Featured On 4 Podcasts

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5 episodes
ZOE Science & Nutrition

4 foods that heal your gut and reduce inflammation (in as little as 24 hours!) | Dr Will Bulsiewisz

ZOE Science & Nutrition
74 minBoard Certified Gastroenterologist and New York Times Bestselling Author

AI Summary

→ WHAT IT COVERS Dr. Will Bulsiewicz explains how chronic low-grade inflammation drives over 130 health conditions, from heart disease to depression, and accounts for three out of five deaths. He reveals the gut microbiome's central role in immune function and presents four nutrition workhorses—fiber, polyphenols, healthy fats, and fermented foods—that measurably reduce inflammatory markers within days. → KEY INSIGHTS - **Fiber deficiency epidemic:** Ninety-five percent of Americans and ninety percent of UK residents lack adequate fiber, the most critical nutritional deficiency today. Professor Andrew Reynolds demonstrated fiber strongly protects against heart disease, heart attacks, three cancer types (breast, colorectal, esophageal), stroke, and diabetes—addressing four of the top ten causes of death in both countries. Fiber feeds gut microbes that produce short-chain fatty acids, the most anti-inflammatory compounds available. - **Gut barrier regeneration:** The gut barrier experiences the greatest cellular turnover in the body, completely replacing itself every three to five days. This rapid regeneration means dietary choices made today directly impact barrier strength by next week. A healthy barrier prevents bacterial endotoxins from crossing into the bloodstream and triggering chronic immune activation. Butyrate, a short-chain fatty acid from fiber fermentation, provides essential energy for tight junction proteins that seal barrier cells together. - **Polyphenol activation requires microbes:** Ninety to ninety-five percent of polyphenols—including quercetin, resveratrol, and curcumin—cannot be absorbed without gut microbiome processing. These large, complex molecules require specialized microbial enzymes to unlock their anti-inflammatory and anti-aging properties. Without a healthy microbiome, consuming polyphenol-rich foods yields only five to ten percent of potential benefits. Adding polyphenols to fiber-rich meals increases short-chain fatty acid production without changing fiber intake. - **Extra virgin olive oil transforms microbiome:** The PREDIMED study with 7,500 participants showed high-fat Mediterranean diets with four tablespoons daily of extra virgin olive oil produced superior cardiovascular outcomes and lower inflammation compared to low-fat diets. Subsequent research demonstrated eight weeks of daily extra virgin olive oil consumption increases gut microbiome diversity. The polyphenols creating bitter, spicy flavors in quality olive oil likely contribute these benefits alongside healthy monounsaturated fats. - **Fermented food reduces inflammation measurably:** Stanford research by Professor Gardner proved ten to twelve weeks of increased fermented food consumption simultaneously increases gut microbiome diversity and reduces inflammatory markers in blood tests. Zoe community research with participants adding two servings daily showed improvements in energy, mood, bloating, and reduced hunger. Most health-conscious individuals neglect this category despite its proven anti-inflammatory effects and historical presence in traditional diets. - **Morning light exposure resets circadian rhythm:** Blue light exposure in morning hours signals the body when the day begins, regulating the entire twenty-four-hour cycle. Without this signal, the body cannot properly time energy production, focus, or sleep preparation. Using a 10,000 lux lamp or stepping outside within hours of waking produces immediate benefits: increased energy, improved cognitive endurance, better mood, and enhanced sleep quality by evening. Modern indoor lifestyles—93 percent of time spent indoors—deprive bodies of this essential timing cue. → NOTABLE MOMENT Bulsiewicz reveals that 70 percent of the immune system resides in the gut lining, not distributed throughout the body as commonly assumed. The gut microbiome serves as the first defense layer, the gut barrier as second, and immune cells as third—meaning immune health depends primarily on gut health. This challenges the conventional view of immunity as a separate system from digestion. 💼 SPONSORS [{"name": "ZOE Daily 30", "url": "zoe.com/daily30"}] 🏷️ Gut Microbiome, Chronic Inflammation, Immune System, Fiber Intake, Fermented Foods, Circadian Rhythm

AI Summary

→ WHAT IT COVERS Dr. Will Bulsiewicz explains how gut microbiome dysbiosis drives chronic inflammation affecting three out of five deaths, and provides specific dietary interventions including fiber diversity targets, polyphenol sources, fermented foods, and circadian rhythm optimization to restore gut barrier function and reduce disease risk. → KEY INSIGHTS - **Fiber diversity target:** Consume 30 different plant foods weekly to reshape microbiome composition within days. This includes fruits, vegetables, whole grains, legumes, nuts, seeds, and mushrooms. Ninety-five percent of Americans are fiber deficient, missing the precursor to short chain fatty acids that power gut barrier repair and immune regulation. - **Short chain fatty acid production:** Butyrate from fiber fermentation serves as primary fuel for colon cells and stimulates tight junction proteins that seal gut barrier. This three-layer defense system (microbes, barrier, immune cells) rises and falls together. Resistant starch specifically feeds left colon microbes while regular fiber feeds right colon populations. - **Ultra-processed food impact:** Every ten percent of calories from ultra-processed foods increases mortality risk by fourteen percent. Children now derive seventy percent of calories from these sources. The combination of sugar, salt, and fat creates hyperpalatability that overrides satiety hormones, leading to 500 extra daily calories compared to whole food diets. - **Morning light protocol:** Get outdoor sunlight exposure within first hour of waking to boost cortisol spike by fifty percent, adding exercise increases it another twenty-five to fifty percent. This synchronizes microbiome circadian rhythm, reduces nocturnal inflammation, and improves same-day energy and sleep quality. Ten thousand lux light boxes substitute in winter months. - **Polyphenol activation mechanism:** Ninety to ninety-five percent of dietary polyphenols reach the colon undigested where gut microbes activate them, increasing short chain fatty acid production from existing fiber. Berries, extra virgin olive oil, and foods grown in harsh outdoor conditions contain higher polyphenol concentrations than greenhouse-grown equivalents due to plant stress responses. → NOTABLE MOMENT Bulsiewicz shares how his father's health transformation through gut-focused interventions became deeply personal, illustrating that healing extends beyond physiological mechanisms into relational and emotional dimensions. This unexpected story demonstrates how microbiome restoration can catalyze broader life changes, connecting scientific intervention with human connection and family dynamics in ways that transcend typical medical outcomes. 💼 SPONSORS [{"name": "Go Brewing", "url": "https://gobrewing.com"}, {"name": "ProLon", "url": "https://prolonlife.com/richroll"}, {"name": "OneSkin", "url": "https://1skin.co/richroll"}, {"name": "AG1", "url": "https://drinkag1.com/richroll"}, {"name": "The Sprouting Company", "url": "https://thesproutingcompany.com/richroll"}, {"name": "Airbnb", "url": "https://airbnb.com/host"}] 🏷️ Gut Microbiome, Chronic Inflammation, Fiber Intake, Circadian Rhythm, Short Chain Fatty Acids, Ultra-Processed Foods

AI Summary

→ WHAT IT COVERS Dr. Will Bulsiewicz explains how chronic inflammation stems from gut microbiome disruption and weakened gut barrier function, affecting over 130 health conditions, and provides practical strategies to restore gut health through fiber, circadian alignment, and lifestyle factors. → KEY INSIGHTS - **Three-Layer Gut Defense System:** The gut microbiome serves as first defense, gut barrier as second (replaced every 3-5 days with 450,000 new cells per second), and immune system as third. When microbes weaken, barrier integrity fails, creating intestinal permeability that triggers chronic inflammation affecting brain, metabolism, hormones, and cardiovascular health. - **Fiber Deficiency Crisis:** 95% of Americans consume insufficient fiber—women average 15g versus 25g recommended, men 18g versus 38g needed. Start with 14g per 1,000 calories consumed. Increase slowly to avoid digestive distress, focusing on whole food sources like chia seeds, avocados (10-12g each), and raspberries rather than extracted inulin supplements. - **Ultra-Processed Food Impact:** 60% of adult calories and 70% of children's calories come from ultra-processed foods. Kevin Hall's research shows people consume 500 extra calories daily on ultra-processed diets versus minimally processed diets with identical macros—equaling one pound of fat gain weekly. Each 10% increase raises mortality risk 14%. - **Circadian Gut Rhythm:** Morning sunlight exposure increases cortisol 50%, activating gut motility and establishing bowel movement timing. Over 50% of gut microbe species rise and fall on 24-hour cycles—focusing on protein metabolism during day, switching to barrier repair and inflammation reduction overnight. Seven days of morning light improves energy, focus, mood, and sleep. - **Resistant Starch and Polyphenols:** Prebiotic fiber ferments in right colon, resistant starch (from heated-then-cooled potatoes, legumes, frozen bread) feeds left colon microbes. Polyphenols like curcumin and quercetin require gut microbes for activation and absorption, while simultaneously increasing short chain fatty acid production by 15-day mark with consistent intake. → NOTABLE MOMENT Dr. Bulsiewicz describes witnessing patients who followed perfect diet and exercise protocols but failed to improve until addressing unresolved trauma or relationship issues. Releasing these emotional chains allowed their health to transform rapidly, representing the most powerful healing he has observed in his gastroenterology career. 💼 SPONSORS [{"name": "Wild Grain", "url": "wildgrain.com/max"}, {"name": "Momentous", "url": "livemomentous.com/genius"}, {"name": "Greenlight", "url": "greenlight.com/spotify"}] 🏷️ Gut Microbiome, Chronic Inflammation, Dietary Fiber, Circadian Rhythm, Intestinal Permeability

AI Summary

→ WHAT IT COVERS Dr. Will Bulsiewicz identifies four essential nutrients missing from 95% of American diets—fiber, polyphenols, healthy fats, and fermented foods—that reduce inflammation and support gut microbiome health regardless of dietary framework chosen. → KEY INSIGHTS - **Four Nutritional Workhorses:** Every diet needs fiber, polyphenols, healthy fats, and fermented foods. These four nutrients address widespread American deficiencies and create anti-inflammatory effects by supporting gut microbiome function. Ninety-five percent of Americans lack sufficient fiber, making it the most critical longevity nutrient to prioritize. - **Short-Chain Fatty Acids:** Gut microbes convert fiber into acetate, propionate, and butyrate—powerful anti-inflammatory compounds that repair gut barrier, suppress inflammatory bacteria like E. coli, and regulate immune function. The gut barrier regenerates completely every three to five days, installing 450,000 new cells per second, creating constant healing opportunities. - **Circadian Eating Patterns:** Insulin sensitivity peaks in morning and declines throughout day, meaning identical foods cause larger blood sugar spikes when consumed later. Fifty percent of human genetic code and over fifty percent of gut microbes operate on twenty-four hour cycles, requiring morning sunlight exposure for fifteen to thirty minutes to boost cortisol by fifty percent. - **Fermented Food Benefits:** Stanford research shows consuming fermented foods for eight weeks increases gut microbiome diversity and reduces inflammation markers by twenty-five percent. Options include yogurt, kefir, sauerkraut, kimchi, miso, tempeh, kombucha, and sourdough bread, which contains zombie probiotics that provide benefits even after baking. - **Glyphosate Microbiome Impact:** Roundup herbicide destroys beneficial gut bacteria while inflammatory bacteria remain resistant. Ultra-processed foods comprise seventy-five percent of supermarket calories, with hyperpalatable combinations of refined carbs, salt, and fat causing people to consume 500 extra calories daily—equivalent to gaining one pound weekly. → NOTABLE MOMENT Dr. Bulsiewicz compares infant formula ingredients to a horror novel, noting that despite adding vitamins and minerals, the first five ingredients remain various oils and protein extracts rather than whole food nutrition, forcing parents to import European formulas for higher quality options. 💼 SPONSORS [{"name": "Our Place", "url": "https://fromourplace.com/model"}, {"name": "Pique Life", "url": "https://peaklife.com/model"}] 🏷️ Gut Health, Microbiome Science, Anti-Inflammatory Diet, Circadian Nutrition, Fermented Foods

AI Summary

→ WHAT IT COVERS Carleigh Bodrug and Will Bulsiewicz reveal how consumers waste 40% of purchased food, contributing more emissions than airlines, while sharing practical strategies to reduce waste and costs. → KEY INSIGHTS - **Meal planning impact:** Checking your fridge and pantry before shopping, then planning all meals for the week prevents duplicate purchases and can reduce household food waste by approximately 50 percent of grocery spending. - **Bread preservation methods:** Freeze half your bread loaf immediately after purchase to prevent waste. Stale bread transforms into croutons, breadcrumbs, panzanella salad, or even cake before reaching the mold stage. - **Frozen bread nutrition:** Freezing bread converts regular starch into resistant starch, which feeds gut bacteria instead of providing human calories. This creates prebiotic benefits and reduces caloric content while supporting digestive health. → NOTABLE MOMENT Freezing bread actually improves its nutritional profile by creating resistant starch that feeds beneficial gut bacteria rather than adding calories, making frozen bread healthier than fresh. 💼 SPONSORS [{"name": "ZOE Daily 30", "url": "zoe.com/dailythirty"}] 🏷️ Food Waste, Gut Health, Meal Planning

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