Dr Michael Mosley trained as a doctor before becoming a journalist, podcast host and television presenter. His bestselling books include The Fast Diet, The 8-Week Blood Sugar Diet, The Clever Guts Diet, The Fast 800, The Fast 800 Keto, Just One Thing and 4 Weeks to Better Sleep. He was married to the author Dr Clare Bailey and they have four children.
Mimi Spencer is a journalist and author. A feature-writer and columnist for titles including the Mail, the Evening Standard, the Guardian, Marie Claire, Harper's Bazaar, Observer Food Monthly and Waitrose Food Illustrated. She is the author of 101 Things To Do Before You Diet (Transworld 2010).