What is melanin? Information on melanin

Skin, eye-muscle at the base koroid (vascular layer) and the dark pigment in hair. Is a substance that can dissolve in water. Melanin metabolism, genetic factors, and is secreted bound to an event. Some people, no melanin in the body can not be made from congenital. These people's hair, all hair and skin is white. Public abraş between them (albino) is that this is a disease that can be hereditary. Rather than the melanin pigment in Black. Some diseases (called malignant melanoma of ur pregnancy, Addison's disease) is increased to make the pigment melanin, and even blood and urine may also interfere.