Antioxidants are substances which protect Cells of your body from the harmful effects of free radicals. Free radicals are highly unstable compounds, which are formed as a product of your natural metabolism as well as due to environmental factors such as pollution, pesticides and radiation. Cigarette smoking also releases harmful free radicals in your body. Free radicals can easily react with the Cells of your body, causing chain reactions and damage your Cells leading to certain diseases like cancer, heart disease and Diabetes. Antioxidants neutralize free radicals thereby preventing cellular damage. 