Best anti-oxidant?

Anti-oxidants combats the oxidants that enter your body by converting them into harmless substances. Oxidants are harmful substances (not just harmful but toxic) that you get when you are eating processed, junk and foods from fast food chain also from the sun's harmful UV rays. The benefit of anti-oxidants is that it helps the body speed up the process of converting oxidants to harmless substances. As for the best and trusted anti-oxidants, I suggest the green tea because it is readily available in the market, mangosteen and grape seed extract.