Antioxidants are ingredients thought to reduce the effects of free radicals. Free radicals are substances that cause oxidative stress, which may contribute to aging and certain diseases. Taking antioxidants is thought to counteract these effects.

Fruits and vegetables contain antioxidants. Eating more fruits and vegetables usually has benefit for disease. But there's limited evidence to know whether antioxidant supplements help to prevent disease.

Antioxidants don't seem to help with various cancers or heart disease. Antioxidants have been tried for asthma, kidney disease in people with diabetes, and many other conditions, but there is no good evidence to support these uses.

How does it work ?

Antioxidants are chemicals that seem to reduce "oxidative stress." Oxidative stress is thought to worsen many different conditions such as cancer and heart disease.
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