I. Hormone postulatum ad mediatam photoperiodicity in mammalibus. Inhibits cerebelli nitric cadmiae synthetase
II. Melatonine potest esse in somno inductione, modifies circadian rhythm, antioxidant, liberum radicalis Scavenger
III. Immunostimulant; Melatonin receptor Ligand
IV. Melatonin habet complexu effectus in apoptotic meatus, inhibentes apoptosis in immune cellulis et neurons sed enhancing apoptotic cellula mortis de cancer cellulis. Inhibits proliferation / metastasis pectus cancer cellulis per inhibendo estrogen receptor actio.