Although many people take isolated nutrients as antioxidant supplements, they may not be getting the benefits they hope for. While isolated nutrients have powerful antioxidant abilities in vitro, they rarely have significant antioxidant benefits in vivo. 

High antioxidant containing foods have proven benefit in humans (in vivo) and high antioxidant effects in vitro as well. High antioxidant containing plants and other herbs are recommended for those interested in obtaining true antioxidant benefits.