
50. Exploring the Microbiome and Immunity w/ Dr. Claire Merrifield
From The Dr. Darian Parker Podcast by Dr. Darian Parker, PhD, NSCA-CPT
January 22, 2026 · 59 min
About this episode
Dr. Claire Merrifield discusses the gut microbiome and its critical role in immunity.
In this episode, Dr. Claire Merrifield returns to discuss the intricacies of the gut microbiome and its role in immunity. Dr. Merrifield explains the complexity of the microbiome, consisting of bacteria, viruses, fungi, and other microbes, and its critical functions in developing our immune system, food tolerance, and metabolism. Dr Claire Merrifield MBBS MRCGP PhD | Co-Founder & Medical Director, Selph Claire is a GP, microbiome researcher and trained mindfulness instructor who brings a rare blend of clinical experience, scientific expertise and real-world empathy to modern healthcare. She’s the Medical Director of Selph, and the heart of its mission: to help people take back control of their own health, with guidance that’s holistic, practical and grounded in science. Claire completed her medical training at Imperial College London, where she later undertook a PhD exploring the link between gut microbes and the immune system. Her research has focused on probiotics, nutrition, immunology and the prevention of chronic illness. As a GP, Claire has supported thousands of patients in understanding their bodies, navigating the healthcare system and making sustainable lifestyle…
People in this episode
Host: Dr. Darian Parker
Guest: Dr. Claire Merrifield
Topics covered
- microbiome
- immunity
- gut health
- nutrition
- chronic illness
- women's health
Keywords
- microbiome
- immunity
- gut health
- probiotics
- nutrition
- chronic illness
- healthcare
Mentioned in this episode
Organizations: Selph, Imperial College London
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