Here it is. It is a pdf file.
http://ecam.oxfordjournals.org/cgi/reprint/nen047v1I am on an aromatase blocking drug, Arimidex. These block the production of estrogen and have some unpleasant side effects as the estrogen in one's body slowly disappears. Men also produce estrogen in smaller quantities and fat cells produce estrogen.
This study should be discussed with your oncologist before using grape seed extract.