All kinds of berries are good sources of antioxidants; Blueberries, raspberries, blackberries, strawberries and cranberries. The best way to eat these are fresh or frozen (frozen is nearly as good as fresh). Strawberry jam or strawberry flavoring doesn’t count—these have sugar and sometimes chemicals in them. Stick to natural food and eat it as close to its natural state as you can to get the maximum antioxidant punch.