When it's time for a treat, chocolate is not a bad way to go, for your brain as well as your taste buds. Several studies have shown that eating flavonol-rich cocoa can improve blood vessel function, boosting circulation throughout the body and blood flow to the brain. The beneficial compounds found in cocoa may even reduce the formation of damaging clots, which may cause heart attacks and strokes.

However, while cocoa, the ingredient that carries "chocolate" flavor, is rich in beneficial compounds, it's often combined with high-fat ingredients in chocolate bars and other desserts, so it's best to keep chocolate treats to a healthy minimum.