Everybody knows losing weight is tough. But why? While diet, exercise, and willpower might have something to do with it. The root may lie in how we humans have evolved as a species. Could our bodies be hardwired to resist shedding pounds? In this episode, Sanjay speaks to Daniel Lieberman, a paleoanthropologist and professor of human evolutionary biology at Harvard University. He’ll explain how our bodies evolved to hold onto fat as a strategy for survival. Plus, we'll get tips for exercising and eating right, with our evolutionary needs in mind.

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