Research has found that selenium and vitamins A, C, and E are more effective when taken together than individually. Combined, they provide a highly active antioxidant complex that helps protect our bodies from free radical damage. Beta-carotene quenches single oxygen molecules; vitamin C guards tissue and blood components; vitamin E protects cell membranes; and selenium serves as a vital building block for glutathione peroxidase, an important member of the antioxidant family. The ACES® formula is recognized as nature's defense, since it mops up free radicals as they form.