The key difference between melanin and melatonin is that melanin is one of the major pigments found in human skin, hair and eye, while melatonin is a hormone produced by the pineal gland and plays a role in somnolence and in the regulation of the sleep-wake cycle.
Melanin and melatonin are two chemically related substances, but with many different characteristic features. Their origin, function, chemical composition and location in the human body vary widely. Hence, this article attempts to discuss the difference between melanin and melatonin.
