Fresh blueberries are an excellent source of antioxidants, including cancer-fighting chlorogenic acid as well as the anthocyanin pigments that give them their color. A food's antioxidant power is measured in ORAC units—which stands for "oxygen radical absorbance capacity"–and blueberries rate the highest of any fruit or vegetable. They also contain anti-inflammatory compounds that can dampen the joint pain of arthritis, and they're an effective treatment for urinary-tract infections. In animal studies, blueberries are credited with slowing or even reversing the aging process in the brain and with improving coordination. Choose fresh or frozen blueberries over bottled blueberry juice or blueberry pie. Anthocyanins are easily destroyed when exposed to heat, light, or large amounts of sugar.