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Ultraviolet A solar rays, a form of sunlight not blocked by most lotions now on the market, can cause wrinkles, sagging and other damage to skin, according to a study to be published today in the Proceedings of the National Academy of Sciences. Ultraviolet A rays penetrate deep into the skin and can cause premature aging, Ultraviolet A are slow-tanning rays, which penetrate deeper into the skin, age the skin and intensify the damaging effects of ultraviolet B. |
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