Antioxidants are natural enemies of free radicals because one of their functions is to break the chain reaction and destroy free radicals. Therefore, while antioxidants can be found in many fresh fruits and vegetables, it still pays to take antioxidant dietary supplement along with your food. Vitamin C antioxidant dietary supplement is perhaps the most famous form of antioxidant available. Free radicals are still necessary for life, but in order to prevent yourself from developing these diseases, you need to take action in keeping free radicals at a minimum. Fortunately for us, the body has a number of mechanisms to minimize free radical induced damage and to repair the damage which does occur. Now, you can find antioxidant supplements in the form of Vitamin A capsules in almost any pharmacy or health food store. Beta-carotene antioxidant supplements generally come from orange, yellow, and green leafy vegetables and fruit. It has been observed that people who eat a lot of foods rich in beta-carotene are not generally prone to cancer. Catechins are the natural antioxidants found in the Camellia sinensis plant where we get our green tea, oolong tea, and black tea. In the carotenoid group, beta-carotene is the most common natural antioxidant. Another name for beta-carotene is vitamin A, that essential vitamin that helps prevent eye damage. Note that it says "molecules" so that means free radicals don't make the distinction between foreign bodies and healthy cells. And when free radicals start attacking the body's own cells, you can guess what the results are - Aging. If only there was a way to get rid of those harmful free radicals. How Antioxidant Foods Work Oxidation is a naturally occurring process in the body so there is really no way for us to avoid or prevent it from happening. Even the mere act of breathing causes oxidation to take place. That being said, free radicals, as by-products of oxidation, will always be present in our body.