Keith Frayn
Keith Frayn is an emeritus professor of human metabolism at the University of Oxford. He has spent his career studying human metabolism and nutrition in different conditions, from injured patients arriving in accident-and-emergency departments, through studies of exercise and recreational hill-walking, to people with diabetes, obesity and lipid disorders. He has published more than 300 scientific articles, an influential textbook and a general primer on human metabolism.
Frayn is currently at work on a book titled The Calorie Equation: How the Inescapable Science of Energy Balance Shapes Us All, to be published in 2025 by Piatkus (UK & Commonwealth).