If your sex drive is low and your progress is stalling in the gym, hormones could be to blame. Testosterone, every guy's best bodybuilding asset, is at its peak during your 20s. After you hit 30, however, it dips about 1.6% per year. Going HAM in the gym is a surefire way of boosting T, but there are other options that can up your levels, too.

So before you run off to the nearest supplement store, try enhancing your testosterone levels with these six foods.