The body produces a few anti-oxidant enzymes, including superoxide dismutase (SOD), catalase, and glutathione peroxidase, that neutralize many types of free radicals. Supplements of these enzymes are available for oral administration, however, their absorption is probably minimal at best.
Levels of this important antioxidant can easily be reduced by stress and mineral deficiencies. Supplementing with the “building blocks” the body requires to make SOD, catalase, and glutathione peroxidase may be more effective. These building block nutrients include the minerals manganese, zinc, and copper for SOD and selenium for glutathione peroxidase which should all be present in a good anti-oxidant formula.