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Free radicals—molecules that are highly reactive with other cellular structures due to unpaired electrons—can cause damage to cells within the body by stealing their electrons via a process called oxidation. This can lead to oxidative stress, which may play a role in the development of diseases such as cancer, heart disease, Alzheimer’s disease and more. Antioxidants have the power to reduce damage caused by free radicals. New research supports positive effects of popular antioxidants on skin health, eye health and more.