If you want to react faster during your next tennis game, chew cinnamon gum. Doing so, a recent study found, speeds the rate at which your brain processes visual cues. One reason the gum may help: cinnamon regulates blood-sugar levels, and this helps you stay focused.
Healthy way to dish it up:
Sprinkle 1 teaspoon cinnamon on oatmeal for a brain-healthy breakfast.