From the best-selling author of Why We Get Fat, a revelatory study of traditional advice on healthy eating—why these established rules might be the wrong approach to weight loss for millions of people, and how low-carbohydrate, high-fat/ketogenic diets can help you achieve and maintain a healthy weight for life. Based on 20 years of investigative reporting and interviews with 100 practicing physicians who embrace this way of eating as the best prescriptions for their patients' health, Taubes's book puts the ketogenic diet movement in the necessary historical and scientific perspective. It makes clear the vital misconceptions in how we've come to think about obesity and diet (no, people do not become fat simply because they eat too much; hormones play the critical role) and uses the collected clinical experience of the medical community to provide essential practical advice. This book sets out to revolutionize how we think about eating healthy, and what foods we can—and can't—eat to prevent and reverse both obesity and diabetes. For years, health organizations have preached the same rules for losing weight: restrict your calories, eat less, exercise more. So why doesn't it work for so many overweight or obese Americans? Gary Taubes, whose seminal book Good Calories, Bad Calories and cover stories for The New York Times Magazine changed the way we look at nutrition and health, sets the record straight, clarifying a century of misunderstanding about the differences between diet, weight control, and health. What to Eat gives us a revolutionary manifesto for the 21st-century diet.