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2. Hyperpigmentation

In addition to affecting skin and hair color, melanin has a protective element that helps block UV radiation by absorbing as much of it and associated free radicals as possible, helping prevent skin cancer. The more UV light melanin absorbs, the darker the skin becomes. However, when the melanin cannot absorb any more, the harmful UV rays begin to damage skin cells, leading to sunburn and skin damage and raising the risk of cancer.

woman swimsuit beach sunburn tan Joel Carillet / Getty Images
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