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Causes of Human Skin Hyperpigmentation. The color of human skin is due primarily to the production of melanin by specialized cells in the skin called melanocytes. Melanin produced by these cells both absorbs and scatters UV radiation and thus protects skin from the damaging and mutagenic effects of the solar radiation.
Dark spots, discoloration, uneven skintoneâno matter what you call it, hyperpigmentation is a complexion killer. âItâs a condition caused by increased levels of melanin, the pigment in the body that determines skin color,â says Khalil Khatri, M.D., dermatologist and cosmetic laser surgeon at The Skin and Laser Surgery Center of New England.