Which vitamin functions as an antioxidant?

Vitamin E is well-known for its role as an antioxidant in the body. Antioxidants are substances that can prevent or slow damage to cells caused by free radicals, which are unstable molecules that can cause oxidative stress and lead to cell damage. Vitamin E, specifically in its various forms, particularly tocopherols and tocotrienols, helps to neutralize these free radicals, thereby protecting cells from oxidative damage.

This antioxidant function is crucial for maintaining the integrity of cell membranes, as Vitamin E is fat-soluble and integrates into cell membranes where it can effectively exert its protective effects. Beyond its antioxidant role, Vitamin E also contributes to immune function and skin health.

The other options presented do not function primarily as antioxidants. For instance, Vitamin A is important for vision and immune function but does not serve the same antioxidant role as Vitamin E. Vitamin B12 is essential for red blood cell formation and neurological function but lacks antioxidant properties. Calcium, while crucial for bone and teeth health, is not a vitamin and does not have antioxidant functions. Thus, Vitamin E stands out in its capacity as a significant antioxidant.