Red, red wine. Apparently, it goes to your prostate as well as your head.Drinking four or more glasses of red wine a week chops the risk of prostate cancer in half, according to a new study from researchers at the Fred Hutchinson Cancer Research Center.Red wine had the greatest impact on the most aggressive, fast-spreading prostate tumors, leading to a 60 percent reduction in such cases, researchers found.Published in the online version of the International Journal of Cancer, the study is the first to find that red wine could help keep prostate cancer at bay, say researchers.