In humans, melanin is the primary determinant of skin and hair color. However, few people know that melanin is found in almost every organ of the body and is necessary for the brain and nerves to operate, the eyes to see, and the cells to reproduce.
It is also found in the stria vascularis of the inner ear. In the brain, tissues with melanin include the medulla and pigment-bearing neurons within areas of the brainstem, such as the locus coeruleus and the substantia nigra. It also occurs in the zona reticularis of the adrenal gland. - Read more at: Atlanta Black Star