Pono ʻo L-Tryptophan no ka ulu maʻamau o nā pēpē a no ke koena o ka nitrogen i nā pākeke, ʻaʻole hiki ke hoʻohui ʻia mai nā mea maʻamau i loko o ke kanaka a me nā holoholona ʻē aʻe, e hōʻike ana e loaʻa wale ia ma ka lawe ʻana i nā protein tryptophan a i ʻole tryptophan no ke kino kanaka. ka mea i nui loa i loko o ke kokoleka, oats, waiu, cottage cheese, ʻiʻo ʻulaʻula, hua manu, iʻa, moa, sesame, almonds, buckwheat, spirulina, a me nā pīni, a me nā mea ʻē aʻe. anxiolytic, a me ke kōkua hiamoe.