For over 25 years Dr Caroline Apovian has been one of the world's premier weight-loss experts. She has also distinguished herself as a leading researcher, treatment provider and teacher while also working as Director of the Nutrition and Weight Management Center at the world-renowned Boston Medical Center and as a former nutrition consultant to NASA. Dr Apovian has contributed to and edited many medical journals, including Obesity and the American Journal of Clinical Nutrition. She is also a weight-loss columnist for EverydayHealth.com, author of the New York Times bestseller The Alli Diet Plan and lectures worldwide on weight loss and health.

Frances Sharpe has worked on many New York Times bestsellers during her 20 years as a professional writer. She has also written for the Huffington Post, Health, Women's Health & Fitness, Muscle & Body Magazine and WellBella Magazine.