an atom or group of electrons having at least one unpaired electron

A by-product of normal cellular activity and as a result of exposure to UV rays, pollution, smoke, drugs, and chemicals. Free-radicals are unstable oxygen molecules that can be quite destructive. Although our bodies naturally eliminate free radicals, our ability to handle this process becomes more difficult as we age. This is important because researchers believe that free radical damage contributes to aging. A number of nutrients including Vitamin A, Vitamin C, Vitamin E, selenium, green tea, grape seed extract and gingko biloba have powerful antioxidant properties.