L-Phenylalanine ke amino acid ea bohlokoa 'me ke selelekela sa amino acid tyrosine.'Mele ha o khone ho etsa phenylalanie empa o hloka phenylalanie ho hlahisa liprotheine.Kahoo, motho o hloka ho fumana phenylalanie lijong.Mefuta e 3 ea phenylalanie e fumaneha ka tlhaho: D-phenylalanine, L-phenylalanine, le DL-phenylalanine.Har'a mefuta ena e meraro, L-phenylalanine ke mofuta oa tlhaho o fumanoang lijong tse ngata tse nang le liprotheine, ho akarelletsa nama ea khomo, ea likhoho, nama ea kolobe, tlhapi, lebese, yogurt, mahe, li-cheeses, lihlahisoa tsa soya, le linate tse itseng le peo.