Melatonin's primary role is the regulation of the body's circadian rhythm, endocrine secretions, and sleep patterns. Studies indicate that it facilitates the onset of sleep, as well as sleep efficiency.¹ Supplementing with melatonin can help support your body's declining production that may occur as you age.^† This sustained release formula releases slowly over several hours to help support blood levels for a longer period of time.^† Contains 99.5% pure melatonin.