The Pineal Gland and Melatonin The pineal gland is a small endocrine gland in the brain that secretes melatonin, a hormone that regulates the sleep-wake cycle. Melatonin is produced from serotonin, and its release is influenced by exposure to light, especially morning and evening sunlight. Proper melatonin levels support deep sleep, antioxidant activity, and DNA … Continue reading Unlocking the Pineal Gland, Melanin, and the Science of Sungazing