You see a boatload of TV commercials espousing the virtues of blueberries and their antioxidants. But at the end of the day, do you know what an antioxidant really does? Exactly. So, here you go: Oxidation produces free radicals that damage cells, which can cause all sorts of disease. Antioxidants prevent or slow oxidation. And blueberries, contain anthocyanin, an antioxidant which strengthens the body’s entire vascular system. So eat up.