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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 changes — especially women’s health, burnout, and gut-brain connection. Claire is also a certified Breathworks Mindfulness instructor, adding depth and compassion to her clinical approach. With her unique ability to bridge science and everyday life, Claire is on a mission to make proactive healthcare more accessible, inclusive and empowering. Dr. Merrifield’s Links: http://www.selph.co.uk https://www.linkedin.com/in/clairemerrifield/ https://www.instagram.com/selphhealthuk/ claire@selph.co.uk Dr. Merrifield’s Probiotic Link: Clinical Guide to Probiotic Products Available in USA Learn More about Dr. Darian: Website: https://doctordarianparker.com/ LinkedIn: https://www.linkedin.com/in/darianparker/ Dr. Darian’s Affiliates: Stick Mobility Get your flexibility back and prevent injuries with Stick Mobility. Training Sticks improve range of motion, muscle activation, coordination, and body awareness to build a strong foundation for better movement. Go to this Link or copy to your browser https://stickmobility.com/darian-parker and use the discount code: 1CEC828F154 to get 10% off of your purchase. Blumaka Run better. Move smarter. Save 20%.Blumaka insoles are built for performance and sustainability, offering elite-level cushioning, grip, and durability with up to 85% recycled foam. Use code FSF20 for 20% off: https://blumakastore.myshopify.com/discount/FSF20 Relax the Back Relax The Back® embraces a holistic approach for a healthier lifestyle grounded in 40 years of proven expertise. Live wellness is our commitment to helping you transform your routine, your space, and your life, with solutions that elevate your physical and mental well-being. Use this link: Relax the Back level up your well being. Hyperice Grab your Hyperice gear and get 10% off using my affiliate link: https://tidd.ly/4noSOfWFrom percussion to compression, elevate your recovery like a pro.Discount applies at checkout. Time Stamps: 00:31 Understanding the Gut Microbiome 01:57 Microbiome’s Role in Immunity and Health 03:58 Diet and the Microbiome 05:24 Microbiome and Mental Health 07:50 Misconceptions and Realities 11:03 Dietary Impact on Microbiome 16:47 Exercise, Stress, and Gut Health 18:25 Meat Consumption and Microbiome 22:03 Complexity of Gut Microbiome 31:41 Complexity of the Microbiome 32:02 Misconceptions and Marketing in Microbiome Health 33:22 Personal Journey into Microbiome Research 34:11 Probiotics: Benefits and Skepticism 36:53 Testing the Microbiome: Insights and Limitations 40:00 Microbiome’s Role in Immunity 42:29 Health Misinformation and the Placebo Effect 46:43 The Challenge of Navigating Health Information 57:15 Concluding Thoughts on Microbiome and Health