I-Melatonin yihomoni efihliweyo yi-mammalian kunye ne-pineal gland, enemisebenzi eyahlukeneyo yebhayoloji, equka ukuphucula umgangatho wokulala, ukulwa nokuguga, kunye nokukhusela imithambo yegazi. ukuphucula umgangatho wokulala, ukunciphisa inani lokuvuka ebusuku, kunye nokwandisa ixesha lokulala. Ukongeza, i-melatonin ikwayi-antioxidant enamandla kakhulu, enokususa i-radicals yamahhala emzimbeni, ilibazise ukuguga, kwaye ibe nefuthe lobuhle kunye nobuhle. nayo inefuthe elikhuselayo kwimithambo yegazi.