Blueberries

Fresh or frozen these tiny superfruits pack a big antioxidant punch. Or better yet a flurry of punches: Studies suggest that eating blueberries regularly can help improve everything from memory and motor skills to blood pressure and metabolism. (Wild blueberries in particular have one of the highest concentrations of the powerful antioxidants known as anthocyanins.) Blueberries are also lower in calories than a lot of other fruits (they contain just 80 per cup) so you can pile them onto your cereal without worrying about your waistline.