077 - IBS, Leaky Gut, SIBO, and Hashimoto's: A Functional Medicine Approach w/ Dr. Izabella Wentz

IBS, leaky gut, SIBO, Hashimoto's are four of the most misunderstood gut health conditions in functional medicine and they're more connected than most people realize. 

In this episode of The Autoimmune Doc podcast, Dr. Taylor Krick sits down with New York Times bestselling author and Hashimoto's thyroid expert Dr. Izabella Wentz to break down the root causes of irritable bowel syndrome, how intestinal permeability triggers autoimmune disease, and why conventional IBS treatment fails 75% of patients. They cover the gut-thyroid connection, SIBO breath testing, elimination diets, food sensitivities, histamine intolerance, mold toxicity, and how to heal your gut naturally using functional lab testing and targeted protocols.

Whether you're dealing with bloating, constipation, diarrhea, or an autoimmune diagnosis like Hashimoto's, this conversation gives you a clear roadmap for identifying your specific root causes and the right order of operations for healing. Dr. Wentz also shares details on her new book covering 20+ treatable causes of IBS.Subscribe to The Autoimmune Doc for weekly deep dives into chronic and complex health conditions.

Connect with Dr. Wentz!!
https://thyroidpharmacist.com/
https://www.instagram.com/izabellawentzpharmd/

Timestamps:

00:39 – How Hashimoto's Led to a Gut Health Discovery
01:56 – Dr. Izabella Wentz's Autoimmune Health Journey
08:35 – Why IBS Precedes Autoimmune Disease by 5–15 Years
10:49 – Leaky Gut and the 3 Requirements for Autoimmunity
14:36 – Best Functional Medicine Labs for Gut Testing
15:51 – Why Conventional IBS Treatment Fails Most Patients
18:50 – Food Sensitivity Testing and Stool Analysis Explained
23:40 – Order of Operations for Treating Gut Conditions
29:52 – SIBO: Why Probiotics and Fiber Make You Worse
32:54 – Low FODMAP Diet Mistakes That Damage Gut Diversity
36:08 – IBS vs IBD: How to Know the Difference
41:35 – Sugar Alcohols and Food Additives That Wreck Your Gut
46:22 – How Glyphosate and Mold Toxins Destroy the Microbiome
49:14 – How Low Thyroid Hormone Shuts Down Digestion
52:31 – Elimination Diets vs Food Sensitivity Testing
57:25 – Histamine Intolerance, Mast Cells, and the Vagus Nerve
1:00:46 – Dr. Wentz's New IBS Book and Where to Find It