Gut Health Expert: The Science of Fiber, Microbiome & Longevity | Dr. Karan Rajan
About this episode
Gabby Reece discusses gut health and the importance of fiber with expert Dr. Karan Rajan.
Your gut is running more of your life than you think. I sit down with Dr. Karan Rajan, NHS surgeon, gut health researcher, and one of the clearest science communicators working today, to talk about why fiber is one of the most powerful levers you have for long-term health, how the gut shapes your mood and brain function, and what most people are getting dangerously wrong about protein, GLP-1s, and extreme elimination diets. This isn't a conversation about cleanses or cutting food groups. It's about understanding your gut as a living system that responds directly to what you feed it, within 48 hours. What we explore: - How the gut microbiome directly shapes mood, mental health, and brain function and why diet is often the missing variable in depression treatment. - Why high-protein, low-fiber eating is silently damaging your colon and what the data says about finding the right balance. - What prebiotics, probiotics, and polyphenols actually do inside your body and how to combine them for maximum impact without buying a single supplement. - How GLP-1 medications affect the gut microbiome and why you have to plan proactively for fiber and nutrient deficiencies if you're on one…
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