Melatonin
Sorry, this is incorrect. Melatonin is not responsible for giving skin its color. Melatonin is a hormone released from the pineal gland in the brain. It is found in all living organisms and is referred to as the "master hormone" because it controls and regulates the production of other human hormones. It plays a significant role in controlling the sleep-wake cycles in humans. It also acts as an antioxidant and is used as a dietary supplement as an aid to better sleep.