Yes, your friend can drink alcohol!! I don’t know if your friend is on the diet or not, but there is phe content in some alcoholic beverages, the highest being in beer, a little bit of phe in wine (really not much). Rum, Vodka, Whiskey, Gin, all that stuff is phe free!! Bottoms up!! Also, a lower phe alternative to beer is hard cider (5 phe or .3 exchanges in 8 oz.), and the lowest phe beer that I know of is Michelob light (12 phes or .8 exchanges in one can). Our livers may be lacking phenylalanine hydroxylase, but they can metabolize liquor!!!