Professor Keith Frayn, PhD ScD, Emeritus Professor of Human Metabolism, Radcliffe Departmentof Medicine, University of Oxford

Winner of the British Nutrition Society's first-ever Blaxter Award and author of an acclaimed newbook.

We all know someone who seems to eat very little yet cannot avoid weight gain, or someone whoeats everything they like while remaining slim. Why? The last 10 years have seen increasingchallenges to the simple model of ‘calories in = calories out’. Even specialists are nowquestioning the forces that shape body weight. In this cutting edge talk, Professor Frayn takesus on a deep dive into the real science of energy balance. He provides a clear-eyed perspectiveon current trends mired in controversy and confusion: time-restricted eating, intermittent fasting,low-carb versus low-fat meal plans, high-protein breakfasts and other dietary fads. He shows usit is possible to reshape our lives and improve health by going back to what is known aboutcalories and getting smart about what to eat.

Join us for drinks from 7pm. Meeting starts at 7.30pm followed by supper if booked.

Two course meal with wine - £25 per head - please book your supper before 3 December 2025 - book via members mailing or email yorkmedicalsociety@gmail.com