Maybe there is some validity to the age-old saying "an apple a day keeps the doctor away." The humble apple is actually high in antioxidants and provides just slightly less than strawberries. Don't skip the skin, though. Antioxidants give color to foods, and the color of the apple is in the skin. Plus, not every apple provides the same amount of antioxidants. The USDA ranking of antioxidant levels found that the apple variety Red Delicious contained more beneficial phytochemicals than Granny Smiths. These two types of apples offered more antioxidants than Gala apples.