Definition:
A substance that protects cells from damage by inhibiting oxidation, a chemical reaction that produces free radicals (highly reactive chemicals) that damage the DNA in cells. These free radicals are produced regularly in our bodies as by-products of natural metabolic processes.
Since damage to cells by free radicals can cause the damage that leads to cancer, antioxidants in our diet may reduce the risk of developing cancer. Examples of antioxidants include vitamin C, vitamin E and flavonoids.
In some cases, antioxidants may interfere with chemotherapy by protecting cancer cells from damage. Also, antioxidant supplements may be harmful when taken in large quantities.
