FROM ATKINS TO PALEO, DIET TRENDS HAVE LARGELY VILIFIED carbohydrates, but proteins (and exercise) remain a trusty, glorified staple. According to the makers of many popular food products and supplements, not only can consuming proteins help you build muscle, it can also help you lose weight and burn fat. Many teens seek out products, such as protein bars, powders, and shakes, to slim down or bulk up.
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