No matter what you eat or how much you exercise, you’re still packing on the pounds. See if your thyroid is to blame and how to fire it up to boost your metabolism and energy. Plus, the power-booster beverage to stimulate your thyroid all day. Then, could your weight gain be caused by a mysterious health condition that affects millions? Take our quiz to find out.

Dr. Oz goes where he's never gone before. He's letting you eat fast-food and it's not what you expect. Learn which fast food meals you can eat under 500 calories while still enjoying the food you love.

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