Melatonin ihomoni inovanzwa neammalian uye munhu pineal gland, iyo ine mabasa akasiyana-siyana ehupenyu, kusanganisira kuvandudza kurara, kudzivirira kuchembera, nekudzivirira tsinga dzeropa. kunatsiridza kunaka kwekurara, kuderedza kuwanda kwekumuka kwehusiku, uye kuwedzera nguva yekurara.Kuwedzera, melatonin inewo antioxidant yakasimba kwazvo, inogona kubvisa mahara radicals mumuviri, kunonoka kuchembera, uye kuve nemhedzisiro yerunako nerunako.Melatonin inewo kudzivirira patsinga dzeropa.