In this podcast Dr. Esra Çavuşoğlu, PhD’s guest is Dr. Sabine Hazan, MD. Dr. Hazan gastroenterologist and microbiome researcher, explains why most consumer microbiome (stool) tests still struggle to guide real clinical decisions. Sabine Hazan is a gastroenterologist and microbiome researcher.She focuses on how the gut microbiome is linked to disease, and is especially known for her clinical work on fecal microbiota transplantation (FMT).She is also the founder of a research laboratory that conducts microbiome analysis and publishes scientific studies in this field. She breaks down the core problem: many tests aren’t consistently valid or reproducible, meaning the same person can get different “baseline” results depending on collection, depth of sequencing, or lab methods, making it hard to know whether a diet change, supplement, or protocol truly helped. She emphasizes that microbiome interpretation must account for geography, lifestyle, and personal baseline, because “normal” in one country or region may not apply in another. • For special ticket offers for Longevilab Women’s Summit 2026,Visit: https://summit.longevilab.com/ #EsraÇavuşoğlu #AyıkKafa #ElevatingLifeEvolvingHealth #Longevilab #SabineHazan #GutHealth Dr. Sabine Hazan, MD:Website: https://progenabiome.com/our-storyInstagram: https://www.instagram.com/dr.sabinehazan/ Special thanks to T.C. Istanbul Gedik University https://www.gedik.edu.tr/en/ 00:00-04:17 Introduction.04:17-07:39 Why stool tests aren’t clinically reliable yet 07:39-09:08 Shallow vs deep sequencing: why “depth” changes everything09:08 09:48 Geography matters: why microbiomes can’t be globally standardized09:48-12:34 Research vs consumer tests: how real clinical validation happens12:34-20:06 Personalized medicine: baseline, history, family comparison, and bias control20:06-30:27 What a “healthy” microbiome really means (and why it’s personal)30:27-32:22 Fecal microbiota transplant (FMT): what it is and what it isn’t32:22-49:52 Donor selection & safety: spouse, family, and why compatibility matters49:52-57:14 COVID era insights: microbiome damage, bifidobacteria loss, resilience57:14-1:00:03 How to know your gut is off without any test1:00:03-1:11:28 Food-based gut health. Wrap up. *About Ayık Kafa* Dr. Esra Çavuşoğlu, PhD, took her studies, starting from her personal treatment experiences and continuing with her clinical psychology education, to the next level by completing her PhD focused on Addiction. Dr. Esra in Ayık Kafa podcast discusses the world’s latest technologies, protocols, products and research in the fields of Biohacking and Longevity, while sharing first-hand information and experiences about the Disease of Addiction, as well as her latest academic studies. *About Dr. Esra Çavuşoğlu, PhD* Longevilab’s founder, Dr. Esra, is a United States and internationally trained clinical psychologist and a certified addiction therapist in New York. She served as International Development Advisor on the Yale University Faculty of Medicine Clinical Advisory Board. She is the founder and supervisor of Gaziantep Oya Bahadır Yüksel Rehabilitation Center, Dr. Esra is the designer and implementer of the Turkey Rehabilitation Model. Dr. Esra founded the Contemporary Addiction Studies Association (ÇABAÇAD) in order to combat Turkey’s growing addiction problem. DisclaimerThe information and statements on our YouTube Channel Sober-Head are not intended to guide individuals towards medical diagnosis and treatment.Please consult with your doctor for medical diagnostic and treatment procedures.The content is shared for informational purposes only, derived from scientific studies prepared by EMC Medya Yayıncılık Ticaret Ltd. Şti.’s researchers, consultants, and authors/scientists, as well as compilations from publicly available public