The Simple Nutrient That Could Transform Your Gut Health, Brain Power & Longevity with Dr Emily Leeming #658

A staggering 96% of people aren't getting enough fiber, yet this humble nutrient is a powerful driver of gut health, brain function, and longevity. In this episode, Dr. Rangan Chatterjee welcomes back Dr. Emily Leeming, a leading dietitian and researcher at King's College London, to unpack the science behind fiber’s transformative effects. Far from just aiding digestion, fiber fuels trillions of gut microbes that produce short-chain fatty acids—molecules proven to reduce inflammation, stabilize blood sugar, lower cancer risk, and even support mental well-being. Leeming reveals that adding just seven extra grams of fiber—equivalent to half a can of beans—can significantly reduce disease risk, and she debunks myths about bloating by advocating for a slow, gentle increase in intake. With practical tools like the BGBG-S acronym (Berries, Greens, Beans, Grains, Seeds) and a four-week plan, she shows how anyone can build a high-fiber diet that’s delicious, affordable, and sustainable. The conversation also explores the alarming rise in bowel cancer among under-50s and how the ongoing £20 million Eat Fibre Study aims to uncover dietary solutions. Ultimately, Leeming argues that fiber isn’t a fad—it’s foundational to long-term health and vitality.