The properties of Melatonin
The primary physiological function of melatonin, whose secretion adjusts to night length, is to convey information concerning the daily cycle of light and darkness to body structures.
The physiological effects of melatonin are various and include detoxification of free radicals and antioxidant actions, bone formation and protection, reproduction, and cardiovascular, immune or body mass regulation.
Melatonin is involved in numerous biological functions including circadian rhythm, sleep, the stress response, aging, and immunity.