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SIBO and Leaky Gut: What the Science Says (webinar recording)

15.2K views· 344 likes· 60:53· May 11, 2026

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What is small intestinal bacterial overgrowth (SIBO), and is it a real disorder? Are the breath tests used to diagnose SIBO bogus? Gastrointestinal symptoms like abdominal pain and bloating account for millions of doctor visits every year. One of the conditions that may be considered for such a nonspecific presentation of symptoms is small intestinal bacterial overgrowth (SIBO), a concept that has gained popularity on the internet. Is SIBO a real disorder? Are the breath tests used to diagnose it bogus? Is the problem not so much overgrowth, but dysbiosis, the growth of the wrong bacteria? If so, should you eat a low-FODMAP diet or a high-fiber diet? Another purported intestinal disorder that’s shrouded in controversy is leaky gut. I cover what intestinal permeability is, what it isn’t, how to prevent it, and how you can heal it with diet. We now offer a growing library of on-demand webinars for CME credits. To learn more and register, visit us on the LearnWorlds platform (https://nutritionfacts.learnworlds.com/). New subscribers to our e-newsletter always receive a free gift. Get yours here: https://nutritionfacts.org/subscribe/. Have a question about this video? Leave it in the comment section at http://nutritionfacts.org/video/sibo-and-leaky-gut-what-the-science-says and someone on the NutritionFacts.org team will try to answer it. Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at https://nutritionfacts.org/video/sibo-and-leaky-gut-what-the-science-says. You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics. Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution! -Michael Greger, MD FACLM Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources: https://nutritionfacts.org/translations-info/ https://NutritionFacts.org • Subscribe: https://nutritionfacts.org/subscribe • Donate: https://nutritionfacts.org/donate • Podcast : https://nutritionfacts.org/audio • Books: https://nutritionfacts.org/books • Shop: https://drgreger.org • Facebook: https://www.facebook.com/NutritionFacts.org • Twitter: https://twitter.com/nutrition_facts • Instagram: https://www.instagram.com/nutrition_facts_org

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