The thoroughly revised Second Edition of this acclaimed reference reflects contemporary medical views on the causes and treatment of obesity and related eating disorders. Thirty of the world's foremost experts synthesize the large amount of recent research on the neural mechanisms that control food intake, the regulation of energy metabolism and body weight, and the role of genetic, environmental, and cultural factors in obesity, and offer sound guidelines on all current treatment options--from diets, exercise, and behavioral therapies, to appetite-suppressant drugs, to surgery for severe obesity. The book includes a state-of-the-art discussion on effective new strategies for maintaining weight loss after treatment.