L-Phenylalanine ni aside amine yingenzi kandi niyo ibanziriza aside amine tyrosine.Umubiri ntushobora gukora fenylalanie ariko ukenera fenylalanie kugirango ubyare proteyine.Rero, abantu bakeneye kubona fenylalanie mubiryo.Ubwoko 3 bwa fenylalanie buboneka muri kamere: D-fenylalanine, L-phenylalanine, na DL-fenylalanine.Muri ubu buryo butatu, L-fenylalanine nuburyo busanzwe buboneka mubiribwa byinshi birimo proteyine, zirimo inyama zinka, inkoko, ingurube, amafi, amata, yogurt, amagi, foromaje, ibikomoka kuri soya, nimbuto zimwe nimbuto.