Ko te tuatahi, ko te tryptophan, hei waikawa amino, he mahi nui ki te whakahaere i te punaha nerve. He tohu ki nga neurotransmitters e awhina ana ki te whakahaere me te whakataurite i nga matū i roto i te roro, e whai waahi nui ana ki te whakapai ake i te ahua, te moe, me te mahi hinengaro. No reira, tryptophan...
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