Traci Mann, a professor of psychology at the University of Minnesota, has spent years studying how people try to lose weight and has come to a grim conclusion: For the vast majority of people, dieting just doesn’t work. It fails because of our physiology; the body plays a game of sabotage by lowering its metabolism or otherwise undercutting our efforts. It fails because life intervenes, with layoffs or new babies or sick parents. It fails because no amount of willpower can be sustained forever. And it fails because when that willpower is working for the dieter, the price that’s being paid is
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