Melotryp

Melatonin is a highly lipid soluble natural hormone secreted by Pinealocytes (cell in the pineal gland) located in mid line of the brain. Although the pineal gland is the primary site for melatonin synthesis, additional sites such as the testis, retina, and gastrointestinal system contribute to circulating levels of melatonin, though in a lesser amount. It is synthesized from the amino acid tryptophan and then released into the blood and cerebrospinal fluid, crossing the blood-brain barrier. It sends messages to the receptor agonist in the brain and other sites of the body to help control the sleep and wake cycles.