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We are GlobalBees Brands . Melatonin is a hormone made by the pineal gland, a small gland located in the brain. Melatonin helps control your sleep and wake cycles, it inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle. Very small amounts of it are found in foods such as meats, grains, fruits, and vegetables. You can also buy it as a supplement. A key factor in how human sleep is regulated is exposure to light or to darkness. Exposure to light stimulates a nerve pathway from the retina in the eye to an area in the brain called the hypothalamus. There, a special centre called the suprachiasmatic nucleus (SCN) initiates signals to other parts of the brain that control hormones, body temperature and other functions that play a role in making us feel sleepy or wide awake.