As guys get a little long in the tooth, we all start to look for the tools to combat the effects of aging. Forget about sagging skin—your fitness is at stake here, and that means the true enemies are slower stamina, a weakened immune system, and weight gain.

Fortunately, there are various ways to help stall the reality of aging. You're already maintaining healthy lifestyle with a sound diet and workout regimen—so make sure to finish the process with these nutritious, muscle-preserving foods.