Antioxidants, a type of substance produced in the body, are found in a variety of foods. These substances help to protect cells from potential harm caused by free radicals, which can lead to oxidative stress. This can cause damage to Deoxyribonucleic acid (DNA) and other essential structures in cells, and can increase the risk of chronic disease. This article review the top 18 antioxidant rich foods, and potential risks of taking antioxidant supplements.