Antioxidant supplements can be overload, experts caution

... in Canada, the U.S., Australia, Italy, Finland and elsewhere have shown that giving megadoses of antioxidants like vitamin E to people with lung cancer and cardiovascular diseases actually promotes oxidation instead of countering it, Rao said. ...

http://www.cbc.ca/news/health/story/2013/08/27/antioxidants-supplement-overdose.html?cmp=rss