L-Tryptophan waxay lagama maarmaan u tahay koritaanka caadiga ah ee dhallaanka iyo dheelitirka nitrogen ee dadka qaangaarka ah, taas oo aan laga soo saari karin walxaha asaasiga ah ee bini'aadamka iyo xayawaanka kale, taas oo soo jeedinaysa in lagu helo oo kaliya qaadashada tryptophan ama borotiinnada tryptophan-ka kooban ee jidhka bini'aadamka. kaas oo si gaar ah ugu badan shukulaatada, boorashka, caanaha, jiiska, hilibka cas, ukunta, kalluunka, digaaga, sisinta, yicibta, buckwheat, spirulina, iyo lawska, iwm. Waxa loo isticmaali karaa kab nafaqo ahaan si loogu isticmaalo sida antidepressant. anxiolytic, iyo gargaar hurdo.