In this episode, Dr. Eric Osansky talks with returning guest Dr. Izabella Wentz about her new book, IBS: Finding and Treating the Root Cause of Irritable Bowel Syndrome. Drawing from both personal experience and clinical insight, Dr. Wentz explains why IBS is often more than just a stress-related diagnosis and how it can serve as an early warning sign of deeper imbalances, including thyroid autoimmunity.The conversation explores the difference between IBS and inflammatory bowel disease, why some people diagnosed with IBS may actually have celiac disease or IBD, and the many possible root causes behind chronic digestive symptoms. Dr. Wentz discusses food reactions, SIBO, parasites, H. pylori, medications, nutrient deficiencies, thyroid hormone imbalances, stress, and lifestyle factors that can all play a role in gut dysfunction. She also shares why testing matters, why symptom relief is not the same as true resolution, and why approaches like the low FODMAP diet may only be a short-term tool.This episode gives listeners a broader, more practical understanding of how gut issues connect with immune dysregulation and thyroid health. If you want a clearer, more balanced understanding of IBS, IBD, and what these digestive symptoms may really be telling you, you’ll get a lot out of this episode.Episode Timeline00:00 – Introducing the episode and why IBS matters 01:26 – Post-episode topics: IBS vs. IBD, celiac, H. pylori, and more 02:22 – Meet Dr. Izabella Wentz 03:58 – Why Dr. Wentz wrote a book on IBS 06:15 – How IBS can precede autoimmune disease 08:13 – How common IBS is and how it’s typically diagnosed 09:25 – When IBS may actually be celiac disease or IBD 11:25 – Dr. Wentz’s husband’s ulcerative colitis story 14:18 – Is IBD autoimmune? 14:54 – The IBS and autoimmunity connection 18:09 – IBS-D vs. IBS-C and why treatment differs 19:59 – Root causes of IBS beyond stress and food sensitivities 24:37 – Medications that can disrupt gut health 26:12 – How to start identifying your IBS triggers 28:28 – Why testing matters for parasites and SIBO 32:24 – SIBO as a root cause or secondary issue 33:03 – Conventional care vs. a functional medicine approach 36:36 – What to do if you think you have IBS or IBD 40:52 – Surprising foods that can trigger IBS symptoms 42:14 – Concerns with the low FODMAP diet 45:20 – Where to learn more about Dr. Wentz and her new book 47:30 – Dr. Eric’s post-episode takeaways on IBS, IBD, celiac, H. pylori, and low FODMAPAbout Dr. Izabella WentzDr. Izabella Wentz is an integrative pharmacist, educator, and New York Times bestselling author known Free resources for your thyroid healthGet your FREE Thyroid and Immune Health Restoration Action Points Checklist at SaveMyThyroidChecklist.comHigh-Quality Nutritional Supplements For Hyperthyroidism and Hashimoto’ s Have you checked out my new ThyroSave supplement line? These high-quality supplements can benefit those with hyperthyroidism and Hashimoto’s, and you can receive special offers, along with 10% off your first order, by signing up for emails and text messages when you visit ThyroSave.com. Do You Want Help Saving Your Thyroid?Get free access to hundreds of articles and blog posts: https://www.naturalendocrinesolutions.com/articles/all-other-articles Watch Dr. Eric’s YouTube channel: https://www.youtube.com/c/NaturalThyroidDoctor/videos Join Dr. Eric’s Graves’ disease and Hashimoto’s group: https://www.facebook.com/groups/saveyourthyroid Take the Thyroid Saving Score Quiz: https://quiz.savemythyroidquiz.com/sf/237dc308 Read all of Dr. Eric’s published books: http://savemythyroid.com/thyroidbooks Work with Dr. Eric: https://savemythyroid.com/work-with-dr-eric/