Chemically, an antioxidant is “a molecule that slows a free radical chain reaction propagating the oxidation of lipids.” Biologically, oxidation is a natural process which contributes to aging, plays a role in the pathogenesis of cancer and cardiovascular disease. Antioxidants act to mitigate negative effects resulting from the oxidation process in the body. Many phytochemicals (chemicals found in plants) are potent antioxidants (mostly fruits, vegetables, grains and nuts).