I saw a news segment yesterday that stated that beer contains a cancer-fighting compound called xanthohumol.
Scientists have found xanthohumol to be toxic to several kinds of human cancer -including prostate, ovarian, breast, and colon. Further, it inhibits enzymes that can activate the development of cancer, and also helps detoxify carcinogens. It even seems to slow down tumor growth in the early stages.
So have a beer - Cheers! :)