{ "episode_id": "the-diary-of-a-ceo-2026-07-10-most-replayed-moment-are-you-really-gluten-intolerant-it-cou", "title": "Most Replayed Moment: Are You Really Gluten Intolerant? It Could Be This Instead!", "podcast": "the-diary-of-a-ceo", "published_at": "2026-07-10", "speakers": [ "Steven Bartlett", "Will Bulsiewicz" ], "summary": "In this 'Most Replayed Moment' clip, gastroenterologist Will Bulsiewicz walks Steven Bartlett through the mechanics of bloating, gas, and gut health. He argues that constipation—often unrecognized because people equate daily bowel movements with being regular—is the number one cause of gas and bloating, and explains that gas travels with stool because roughly 60% of stool weight is the microbiome fermenting whatever it contacts. Bulsiewicz reframes the popular idea of 'gluten intolerance,' contending that for most non-celiac people the real trigger is fructans (prebiotic carbohydrates in wheat, barley, and rye), citing a Gastroenterology study in which a gluten bar caused fewer symptoms than placebo while a fructan bar triggered them; he also blames glyphosate (Roundup) sprayed on US wheat for disrupting the microbiome, which he says explains why some people tolerate wheat in Italy but not the US, and notes that fermenting dough into sourdough lowers fructan content. The final segment turns to inflammatory bowel disease—Crohn's and ulcerative colitis—which he frames not as truly autoimmune but as the immune system attacking and rejecting the microbiome, describes as rising with industrialization, and links to antibiotic use, which he says doubles one-year IBD risk.", "topics": [ { "name": "When digestive symptoms signal a real problem", "timestamp": "1:12", "summary": "Bulsiewicz says occasional bloating is normal, but chronic, daily symptoms you dread waking up to signal a real problem that needs a personalized approach." }, { "name": "Constipation as the hidden number-one cause of gas and bloating", "timestamp": "2:06", "summary": "He argues constipation is the most common cause of gas and bloating and is widely unrecognized because people equate daily bowel movements with regularity, when the real issue is incomplete emptying ('partial poops')." }, { "name": "How gas is produced: the microbiome makes up 60% of stool", "timestamp": "4:07", "summary": "Bulsiewicz explains that gas travels with poop because about 60% of stool weight is microbial; when stool stalls, those microbes ferment whatever they contact and produce gas." }, { "name": "The three causes of gas and bloating: motility, microbiome, diet", "timestamp": "6:27", "summary": "He lays out the framework that gas and bloating stem from motility (constipation), a damaged microbiome that can't process fiber, and diet—naming lactose and, in wheat, the fructans that accompany gluten." }, { "name": "Gluten vs fructans: why 'gluten intolerance' is misnamed", "timestamp": "8:59", "summary": "Discussing Steven's pasta symptoms, Bulsiewicz argues most self-diagnosed gluten intolerance is really a fructan intolerance and that unnecessary gluten-free diets can themselves cause problems." }, { "name": "Glyphosate on US wheat and the Italy paradox", "timestamp": "10:05", "summary": "He blames glyphosate (Roundup) sprayed on US wheat to dry it for disrupting the microbiome and depleting beneficial bacteria, offering it as a reason people who react to wheat in the US often tolerate it in Italy." }, { "name": "Sourdough, fermentation, and the fructan study", "timestamp": "12:42", "summary": "Bulsiewicz explains that fermenting dough reduces fructan content (why sourdough is better tolerated) and cites a Gastroenterology study in which a gluten bar caused fewer symptoms than placebo while a fructan bar triggered them—evidence the trigger is fructans, not gluten." }, { "name": "Repairing the gut, dysbiosis, and inflammatory bowel disease", "timestamp": "16:00", "summary": "Gut repair depends on the starting damage; the deepest dysbiosis is in inflammatory bowel diseases like Crohn's and ulcerative colitis, which can be pushed into deep remission but described using a bleeding-ulcer intestinal model." }, { "name": "IBD as the immune system rejecting the microbiome; industrialization and antibiotics", "timestamp": "18:42", "summary": "He frames IBD not as true autoimmunity but as the immune system attacking the microbiome, notes a genetic component, describes cases rising with industrialization and up to 55% growth in the US from 1970 to 2010, and says antibiotics double one-year IBD risk." } ], "entities": [ { "name": "Will Bulsiewicz", "type": "person", "salience": "central", "role_in_episode": "Guest gastroenterologist explaining bloating, gut health, gluten vs fructans, and inflammatory bowel disease" }, { "name": "Steven Bartlett", "type": "person", "salience": "central", "role_in_episode": "Host asking the questions and sharing his own pasta/bloating experience" }, { "name": "gut health", "type": "concept", "salience": "central", "role_in_episode": "The overarching subject of the whole conversation" }, { "name": "microbiome", "type": "concept", "salience": "central", "role_in_episode": "The gut bacteria that make up ~60% of stool and drive gas, fiber processing, and immune development" }, { "name": "constipation", "type": "concept", "salience": "central", "role_in_episode": "The number-one cause of gas and bloating, often unrecognized as 'partial poops'" }, { "name": "gas and bloating", "type": "concept", "salience": "central", "role_in_episode": "The core symptom cluster being explained across motility, microbiome, and diet" }, { "name": "gluten", "type": "concept", "salience": "central", "role_in_episode": "The protein wrongly blamed for symptoms Bulsiewicz attributes to fructans" }, { "name": "fructans", "type": "concept", "salience": "central", "role_in_episode": "Prebiotic carbohydrates in wheat/barley/rye that Bulsiewicz says are the real trigger behind supposed gluten intolerance" }, { "name": "glyphosate", "type": "concept", "salience": "discussed", "role_in_episode": "Roundup weed-killer sprayed on US wheat, blamed for disrupting the microbiome" }, { "name": "wheat", "type": "concept", "salience": "discussed", "role_in_episode": "Grain at the center of the gluten/fructan/glyphosate discussion" }, { "name": "sourdough", "type": "concept", "salience": "discussed", "role_in_episode": "Fermented bread that is better tolerated because fermentation reduces fructan content" }, { "name": "fiber", "type": "concept", "salience": "discussed", "role_in_episode": "Indigestible to humans but fermented by microbes into short-chain fatty acids" }, { "name": "motility", "type": "concept", "salience": "discussed", "role_in_episode": "The rhythm of intestinal movement; too slow causes constipation, too fast causes diarrhea" }, { "name": "inflammatory bowel disease", "type": "concept", "salience": "discussed", "role_in_episode": "The deepest form of gut damage, framed as the immune system attacking the microbiome" }, { "name": "Crohn's disease", "type": "concept", "salience": "discussed", "role_in_episode": "Form of inflammatory bowel disease cited as rising with industrialization" }, { "name": "ulcerative colitis", "type": "concept", "salience": "discussed", "role_in_episode": "Form of inflammatory bowel disease cited alongside Crohn's in the 1970-2010 rise" }, { "name": "dysbiosis", "type": "concept", "salience": "discussed", "role_in_episode": "The term Bulsiewicz uses for a damaged gut" }, { "name": "antibiotics", "type": "concept", "salience": "discussed", "role_in_episode": "Named as the fastest way to decimate the gut and to double one-year IBD risk" }, { "name": "immune system", "type": "concept", "salience": "discussed", "role_in_episode": "In IBD, attacks and rejects the microbiome; shaped by microbiome health in the first three years of life" }, { "name": "lactose", "type": "concept", "salience": "mentioned", "role_in_episode": "Dairy sugar that is easily fermented to produce gas" }, { "name": "celiac disease", "type": "concept", "salience": "mentioned", "role_in_episode": "Distinguished from the fructan-sensitive study subjects who lacked it" }, { "name": "short chain fatty acids", "type": "concept", "salience": "mentioned", "role_in_episode": "Beneficial products of microbes fermenting fiber" }, { "name": "Gastroenterology", "type": "organization", "salience": "mentioned", "role_in_episode": "The top journal in Bulsiewicz's field, source of the gluten-vs-fructan breakfast-bar study" }, { "name": "United States", "type": "place", "salience": "mentioned", "role_in_episode": "Where wheat is sprayed with glyphosate and where IBD cases rose up to 55% from 1970 to 2010" }, { "name": "Italy", "type": "place", "salience": "mentioned", "role_in_episode": "Where people who react to US wheat often tolerate wheat, attributed to no glyphosate spraying" } ], "claims": [ { "holder": "Will Bulsiewicz", "claim": "Occasional bloating is normal, but a chronic issue you wake up dreading each day is a real problem that must be addressed.", "stance": "opinion", "conviction": 0.7, "subjects": [ "gut health", "gas and bloating" ], "timestamp": "1:22", "quote": "If you're the type of person who you wake up in the morning and you say, I hope today is going to be a good day. I hope I don't have to deal with that specific issue. You have a problem." }, { "holder": "Will Bulsiewicz", "claim": "Constipation is the number one cause of gas and bloating.", "stance": "assertion", "conviction": 0.9, "subjects": [ "constipation", "gas and bloating" ], "timestamp": "2:06", "quote": "If I have to like start with, what is my number one thing? It's constipation. For sure. 100%." }, { "holder": "Will Bulsiewicz", "claim": "Many people are constipated without knowing it because they wrongly equate pooping every day with not being constipated.", "stance": "assertion", "conviction": 0.8, "subjects": [ "constipation" ], "timestamp": "2:06", "quote": "There are so many people who are listening right now that are constipated and they don't even know it because they poop every day and they think that how often they poop is the definition." }, { "holder": "Will Bulsiewicz", "claim": "Constipation is about not adequately emptying your bowels, not merely how often you go.", "stance": "assertion", "conviction": 0.75, "subjects": [ "constipation" ], "timestamp": "2:06", "quote": "So constipation is what happens when you're not adequately emptying your bowels." }, { "holder": "Will Bulsiewicz", "claim": "Constipation is strongly associated with gas and bloating because gas travels with stalled poop.", "stance": "assertion", "conviction": 0.85, "subjects": [ "constipation", "gas and bloating", "microbiome" ], "timestamp": "6:02", "quote": "So this is a big part of the reason why constipation is so strongly associated with gas and bloating." }, { "holder": "Will Bulsiewicz", "claim": "Gas and bloating has three main causes: motility (constipation), a damaged microbiome, and diet.", "stance": "assertion", "conviction": 0.8, "subjects": [ "gas and bloating", "motility", "microbiome" ], "timestamp": "6:39", "quote": "Motility is just one of the causes of gas and bloating. The second is the microbiome." }, { "holder": "Steven Bartlett", "claim": "Only a small percentage of the population is actually gluten intolerant, yet most people think they are to some degree.", "stance": "assertion", "conviction": 0.6, "subjects": [ "gluten" ], "timestamp": "9:18", "quote": "such a small percentage of the population is actually gluten intolerant. But we all kind of think we are to some degree." }, { "holder": "Will Bulsiewicz", "claim": "Going gluten-free unnecessarily can itself cause problems unless you know what dietary adaptations to make.", "stance": "opinion", "conviction": 0.7, "subjects": [ "gluten" ], "timestamp": "9:49", "quote": "And actually, it can cause problems. It can cause problems to be gluten-free unless you know what adaptations to make." }, { "holder": "Will Bulsiewicz", "claim": "Glyphosate disrupts the microbiome, depleting beneficial bacteria while the inflammatory ones tolerate it best, shifting the balance toward bad bacteria.", "stance": "assertion", "conviction": 0.75, "subjects": [ "glyphosate", "microbiome", "wheat" ], "timestamp": "10:41", "quote": "We know that glyphosate disrupts the microbiome, that it depletes the beneficial bacteria, and the ones that tolerate it the best are the inflammatory ones." }, { "holder": "Will Bulsiewicz", "claim": "Fermenting wheat/dough reduces its fructan content, which is why fructan-sensitive people tolerate sourdough.", "stance": "assertion", "conviction": 0.85, "subjects": [ "sourdough", "fructans", "wheat" ], "timestamp": "12:42", "quote": "When you ferment your wheat, when you ferment your dough, you actually reduce the fructan content." }, { "holder": "Will Bulsiewicz", "claim": "In the Gastroenterology breakfast-bar study, the gluten is not the problem—the fructans are.", "stance": "fact_cited", "conviction": 0.8, "subjects": [ "gluten", "fructans" ], "timestamp": "13:43", "quote": "So in other words, the gluten is not the problem." }, { "holder": "Will Bulsiewicz", "claim": "What people call gluten intolerance is misnamed; it is really a fructan intolerance.", "stance": "assertion", "conviction": 0.85, "subjects": [ "gluten", "fructans" ], "timestamp": "13:43", "quote": "we have been taking this concept of gluten intolerance and we've misnamed it. It's not a gluten intolerance. It's a fructane intolerance." }, { "holder": "Will Bulsiewicz", "claim": "Inflammatory bowel disease is not truly autoimmune—the immune system attacks and rejects the microbiome, not the body's own intestines.", "stance": "assertion", "conviction": 0.7, "subjects": [ "inflammatory bowel disease", "immune system", "microbiome" ], "timestamp": "16:33", "quote": "The immune system is not attacking your intestines. The immune system is attacking your microbiome and rejecting it." }, { "holder": "Will Bulsiewicz", "claim": "A healthy microbiome in the first three years of childhood results in a healthier immune system.", "stance": "assertion", "conviction": 0.75, "subjects": [ "microbiome", "immune system" ], "timestamp": "17:46", "quote": "when the microbiome is healthy during childhood, during those first three years, it results in a healthier immune system." }, { "holder": "Will Bulsiewicz", "claim": "Inflammatory bowel disease has a clear genetic component and is not entirely within a person's control.", "stance": "assertion", "conviction": 0.8, "subjects": [ "inflammatory bowel disease" ], "timestamp": "19:02", "quote": "there's clearly a genetic component. Okay, so we have to be upfront about that." }, { "holder": "Will Bulsiewicz", "claim": "Inflammatory bowel disease is rare in the developing world and takes off as countries industrialize.", "stance": "assertion", "conviction": 0.75, "subjects": [ "inflammatory bowel disease" ], "timestamp": "19:19", "quote": "as countries industrialize, there's a takeoff." }, { "holder": "Will Bulsiewicz", "claim": "Taking antibiotics doubles your risk of developing inflammatory bowel disease within the next year.", "stance": "assertion", "conviction": 0.85, "subjects": [ "antibiotics", "inflammatory bowel disease" ], "timestamp": "20:05", "quote": "If you take antibiotics, your risk of developing an inflammatory bowel disease in the next year just doubled." } ], "predictions": [], "facts": [ { "statement": "About 60% of the weight of stool is microbial (bacteria), not just leftover food.", "subjects": [ "microbiome" ], "value": "60% of stool weight", "timestamp": "4:07", "quote": "Sixty percent of the weight of your stool is microbial.", "source": "Will Bulsiewicz" }, { "statement": "Gut microbes have roughly 60,000 enzymes that humans lack, which they use to break down fiber.", "subjects": [ "microbiome", "fiber" ], "value": "60,000 enzymes", "timestamp": "6:39", "quote": "they have literally 60,000 enzymes that we don't have as humans.", "source": "Will Bulsiewicz" }, { "statement": "Gluten-containing foods—wheat, barley and rye—also contain carbohydrates called fructans.", "subjects": [ "gluten", "fructans", "wheat" ], "timestamp": "6:39", "quote": "gluten-containing foods, which are wheat, barley and rye, also contain these carbohydrates called fructans.", "source": "Will Bulsiewicz" }, { "statement": "Lactose, the sugar in dairy, can be easily fermented to produce gas.", "subjects": [ "lactose" ], "timestamp": "6:39", "quote": "Lactose can be easily fermented to produce gas.", "source": "Will Bulsiewicz" }, { "statement": "In the United States, wheat is allowed to be sprayed with glyphosate (Roundup, a weed killer) to dry it out quickly before shipping.", "subjects": [ "glyphosate", "wheat", "United States" ], "timestamp": "10:05", "quote": "they allow the wheat to be sprayed with glyphosate, which is round up. It's a weed killer.", "source": "Will Bulsiewicz" }, { "statement": "Glyphosate is not listed on food labels; the only way to reliably avoid it is to buy organic.", "subjects": [ "glyphosate" ], "timestamp": "10:41", "quote": "the problem is that glyphosate is not on the label.", "source": "Will Bulsiewicz" }, { "statement": "Glyphosate kills plants by shutting down the shikimate pathway; humans have an amino-acid workaround but gut microbes do not.", "subjects": [ "glyphosate", "microbiome" ], "timestamp": "10:41", "quote": "what it does is it shuts down this thing called the Shickamaw pathway, and that kills weeds or it kills plants.", "source": "Will Bulsiewicz" }, { "statement": "In a Gastroenterology study, non-celiac people who self-reported gluten problems had fewer symptoms from a gluten bar than from placebo.", "subjects": [ "gluten", "fructans", "Gastroenterology" ], "timestamp": "13:43", "quote": "When they ate the gluten containing bar, they actually had less symptoms than the placebo.", "source": "Will Bulsiewicz" }, { "statement": "Teff, amaranth, sorghum and quinoa are whole grains that contain neither gluten nor fructans.", "subjects": [ "fructans", "gluten" ], "timestamp": "15:28", "quote": "Teff, amaranth, sorghum, quinoa. These are whole grains that don't contain gluten and they also don't contain fructans.", "source": "Will Bulsiewicz" }, { "statement": "The microbiome is built during the first three years of life and is basically adult-sized by age three.", "subjects": [ "microbiome" ], "timestamp": "17:46", "quote": "by three years of age, you are basically fully adult-sized in terms of your microbiome.", "source": "Will Bulsiewicz" }, { "statement": "'Dysbiosis' is the term used for a damaged gut.", "subjects": [ "dysbiosis" ], "timestamp": "16:00", "quote": "Dysbiosis is the word that we use for a damaged gut.", "source": "Will Bulsiewicz" }, { "statement": "In the United States, from 1970 to 2010, ulcerative colitis and Crohn's disease cases increased by up to 55%.", "subjects": [ "inflammatory bowel disease", "ulcerative colitis", "Crohn's disease", "United States" ], "value": "up to 55% (1970-2010)", "timestamp": "19:19", "quote": "within the United States, over the course of 40 years, from 1970 to 2010, all sort of colitis and Crohn's disease cases were increasing by up to 55%.", "source": "Will Bulsiewicz" }, { "statement": "A course of antibiotics disrupts the gut barrier by 50%, reducing diversity and activating the immune system.", "subjects": [ "antibiotics", "microbiome" ], "value": "50% barrier disruption", "timestamp": "20:16", "quote": "disrupting the gut barrier by 50% during the course of antibiotics", "source": "Will Bulsiewicz" } ], "notable_quotes": [ { "speaker": "Will Bulsiewicz", "timestamp": "4:07", "quote": "So gas travels with poop.", "why": "Compact, memorable statement of the mechanism linking constipation to gas and bloating." }, { "speaker": "Will Bulsiewicz", "timestamp": "4:07", "quote": "your poop is predominantly your microbiome. Sixty percent of the weight of your stool is microbial.", "why": "The surprising fact that reframes stool as mostly living bacteria." }, { "speaker": "Steven Bartlett", "timestamp": "9:18", "quote": "such a small percentage of the population is actually gluten intolerant. But we all kind of think we are to some degree.", "why": "Sets up the episode's central reframe about over-diagnosed gluten intolerance." }, { "speaker": "Will Bulsiewicz", "timestamp": "13:43", "quote": "It's not a gluten intolerance. It's a fructane intolerance.", "why": "The headline claim of the clip and the answer to its titular question." }, { "speaker": "Will Bulsiewicz", "timestamp": "16:33", "quote": "The immune system is not attacking your intestines. The immune system is attacking your microbiome and rejecting it.", "why": "Reframes inflammatory bowel disease as a microbiome-rejection problem rather than classic autoimmunity." } ], "extracted_by": "agent", "prompt_version": "episode-extract@3", "_file": "the-diary-of-a-ceo-2026-07-10-most-replayed-moment-are-you-really-gluten-intolerant-it-cou.json" }