L-Phenylalanine inokosha amino acid uye ndiyo inotangira amino acid tyrosine.Muviri haugone kugadzira phenylalanie asi unoda phenylalanie kugadzira mapuroteni.Nokudaro, vanhu vanoda kuwana phenylalanie kubva muchikafu.3 mafomu e phenylalanie anowanikwa mune zvakasikwa: D-phenylalanine, L-phenylalanine, uye DL-phenylalanine.Pakati pemhando nhatu idzi, L-phenylalanine ndiyo yakasikwa inowanikwa muzvikafu zvakawanda zvine mapuroteni, anosanganisira nyama yemombe, huku, nyama yenguruve, hove, mukaka, yogati, mazai, chizi, zvigadzirwa zvesoya, uye dzimwe nzungu nembeu.