THIS IS A LIPOSOMAL COMPLEX. LIPOSOMES SURROUND THE MELATONIN TO ENSURE BIOAVAILABILITY. Melatonin is a powerful hormone secreted by the pineal gland located in the brain. Its secretion is stimulated by the dark and inhibited by light, and it aids in the regulation of the body’s circadian rhythm, or sleep-wake cycle. Research done at the Wurtman Lab at M I T has shown that melatonin tells us when to fall asleep and helps us remain asleep. Research at Wurtman also showed that as we age we make dramatically less melatonin. “Older people often complain of insomnia, particularly difficulty in staying asleep, and in falling back to sleep after they awaken at night. Doses of melatonin which give them "youthful" blood melatonin levels correct this insomnia.”