20 Foods That Keep You Young

Exhausted after a workout that used to feel easy? Go ahead and guzzle a glass of chocolate milk. Yep—we were surprised, too. But low-fat chocolate milk has the ideal ratio of carbohydrates to protein to help you get the most of that exercise session, according to a 2011 study conducted by the University of Texas. More specifically, research participants who downed it instead of a pure-carb drink didn't just have a better body composition (more muscle, less fat), but they also ended up in better physical shape overall.