October 11/Columbus, Ind./The Republic -- Researchers now say antioxidants have been overhyped and widely misunderstood. Scientists have not yet determined exactly how antioxidants work in our bodies; it is also unclear whether dietary supplements have any beneficial effect. In some cases, studies suggest antioxidants may cause more harm than good.
One recent study found that antioxidant compounds caused fertility problems in mice. Though popular among athletes, antioxidants have not been shown to improve performance or speed recovery. On the contrary, supplementing with antioxidants may blunt the beneficial effects of working out. Also, while some dietary antioxidants may have a role in cancer prevention, excessive doses of some vitamins can aggravate illness or even cause it, researchers say.