This summer, Senate Majority Leader Chuck Schumer (D-New York) asked the Food and Drug Administration to look into an energy drink called Prime, which has 200 milligrams of caffeine per can and, Schumer said, was marketed to children.

So what is a safe level of caffeine for kids? What about adults? Host Mike Rogers visited with Amy Goodson, a Dallas-based registered dietitian, about the amount of caffeine we consume and what causes us to feel so sluggish.