A skin pigment (substance that gives the
skin its color). Dark-skinned people have more melanin than light-
skinned people. Melanin also acts as a sunscreen and protects the
skin from ultraviolet light.
Melanin is produced by cells called
melanocytes. It provides some protection again skin damage from the
sun, and the melanocytes increase their production of melanin in
response to sun exposure. Freckles, which occur in people of all
races, are small, concentrated areas of increased melanin
production.
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