It turns out that beer hops contain a unique micronutrient that inhibits cancer-causing enzymes. . . . Most beers made today are low on hops, however, and so don't contain much xanthohumol. But beers known for being "hoppy" usually porter, stout and ale types have much higher levels of the compound.
Even better, you could try one of the many "hoppy" microbrews that he recommends.