For the first time in our history, scientists are uncovering astounding medical evidence about dieting--and why so many of us struggle with our weight and the size of our waists. Now researchers are unraveling biological secrets about such things as why you crave chocolate or gorge at buffets or store so much fat. Michael Roizen and Mehmet Oz, America's most trusted doctor team and authors of the bestselling YOU series, are now translating this cutting-edge information to help you shave inches off your waist.