In this episode, Dr. Eric sits down with gut health expert Lindsey Parsons to explore the deeper root causes behind SIBO—especially post-infectious IBS. Lindsey shares her personal journey from food poisoning to chronic gut issues and autoimmune conditions, eventually leading her to specialize in helping others heal complex digestive disorders.They dive into what really drives recurrent SIBO, explaining how an autoimmune response triggered by food poisoning can damage the migrating motor complex, leading to ongoing bacterial overgrowth. Lindsey breaks down the differences between hydrogen and methane SIBO, the role of fungal overgrowth (SIFO), and why many traditional approaches fail to provide lasting results. The conversation also covers testing options like the IBS Smart test, limitations of breath testing, and how to better assess the gut microbiome.You’ll also learn about effective treatment strategies, including when to use antibiotics versus herbal antimicrobials, the emerging use of MSM, the controversy around berberine, and the critical role of prokinetics in long-term management. If you want a clearer, more balanced understanding of why SIBO keeps coming back and how to manage it effectively, you’ll get a lot out of this episode.Episode Timeline:00:00 – Introduction to SIBO and Post-Infectious IBS 02:05 – Lindsey’s personal health journey and root cause discovery 08:02 – What causes SIBO (and why it keeps coming back) 11:04 – The migrating motor complex and autoimmunity connection 12:25 – IBS Smart test and identifying post-infectious IBS 16:06 – Breath testing vs. stool testing for SIBO 23:33 – Food triggers, FODMAPs, and diet myths 27:10 – Hydrogen sulfide SIBO and symptom patterns 29:25 – Treatment options: antibiotics vs. herbal approaches 31:03 – MSM protocol for SIBO 33:25 – The berberine controversy explained 38:51 – What are prokinetics and why they matter 41:55 – Fasting mimicking diet and antibody changes 43:35 – Rebuilding the gut with fiber and butyrate support 46:13 – Additional tools: SBI powder, tributyrin, and pomegranate huskTo register or to simply learn more about the Accelerated Thyroid Healing Challenge visit savemythyroid.com/thyroidhealing2026   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/