Antioxidants – too much of a good thing?

So I've got 8 more years get my resveratrol, so for now I can continue buying red grapes and drinking red wine.
http://www.alphagalileo.org/ViewItem.aspx?ItemId=133096&CultureCode=en
In older men, a natural antioxidant compound found in red grapes and other plants – called resveratrol – blocks many of the cardiovascular benefits of exercise, according to research published today [22 July 2013] in The Journal of Physiology.
Resveratrol has received widespread attention as a possible anti-aging compound and is now widely available as a dietary supplement; much has been made of its role in explaining the cardiovascular health benefits of red wine, and other foods. But now, new research at The University of Copenhagen surprisingly suggests that eating a diet rich in antioxidants may actually counteract many of the health benefits of exercise, including reduced blood pressure and cholesterol.

Much more explanation at the link.