He hormone huna ʻia ʻo Melatonin e ka mammalian a me ke kanaka pineal gland, nona nā ʻano hana like ʻole, me ka hoʻomaikaʻi ʻana i ka maikaʻi o ka hiamoe, anti-aging, a me ka pale ʻana i nā kīʻaha koko. ka hoʻomaikaʻi ʻana i ka maikaʻi o ka hiamoe, hoʻemi i ka helu o nā ala ala pō, a hoʻolōʻihi i ka manawa hiamoe hohonu. Eia kekahi, he antioxidant ikaika loa ka melatonin, hiki ke wehe i nā radical manuahi i ke kino, hoʻopaneʻe i ka ʻelemakule, a loaʻa ka hopena o ka nani a me ka nani. Melatonin he hopena pale nō hoʻi i nā kīʻaha koko.