The best known antioxidant vitamins and minerals are vitamin A, beta-carotene, vitamins C and E, the minerals Selenium, Zinc, Manganese, Copper, and Iron. The body uses these elements to make free radical enzyme scavengers; which neutralize the free radicals. The four most important enzymes that neutralize the free radicals are the superoxide dismutase (SOD) enzyme, methionine reductase, catalase, and glutathione peroxidase.