In each moment, in the natural process of oxidation (turning oxygen into needed energy), our bodies produce toxins called “free radicals.” These molecules can cause damage to cells and DNA, but are generally “mopped up” by substances called antioxidants before they can hurt us.

As we age, however, this process becomes more inefficient. Free radical or oxidative damage has been implicated in several age-related diseases, from cancer to Alzheimer’s. Some researchers have even suggested that this damage may be a central cause of the aging process itself. Scientists are now investigating how diets rich in antioxidants (Vitamins C and E are two of the most common) can limit the harm caused by oxidative damage and perhaps even slow aging.