Blueberries

One of Eat This, Not That's 8 Foods You Should Eat Everyday. Blueberries are host to more antioxidants than any other North American fruit. They help prevent cancer, diabetes, and age-related memory changes. Studies show that blueberries, which are rich in fiber and vitamins A and C, also boost cardiovascular health. Aim for 1 cup fresh blueberries a day, or 1/2 cup frozen or dried.
Substitutes: Acai berries, purple grapes, prunes, raisins, strawberries
Fit it in: Dried, frozen, jam