Skin color is determined by the amount of melanin in the skin. Melanin is a pigment produced by specialized cells called melanocytes. People with dark skin have more melanin and skin lightening product can be used to brighten the skin color.

Changes in skin color will often resolve themselves. For instance, tans fade when the amount of direct exposure to sunlight is reduced. But over time, certain discolorations, such as “age” spots or liver spots, become more or less permanent.

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