How to Lose Weight Well is the hugely successful Channel 4 programme that follows dieters as they try out the most hyped and popular diets on the market. Guiding them through their journeys is Dr Xand van Tulleken, a qualified doctor, a scientist, a busy father and now the author of this book. He used to weigh 19 stone. He now weighs 12 stone and has maintained this weight for several years. In the making of How to Lose Weight Well, he tried out many of the diets featured on the shows and drew from his own experience losing weight and the most effective and sustainable of the diets to create the diet and 4-step plan proposed in this book.