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05-20-2007, 02:08 PM | #1 |
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Causes of Aging Skin
Research shows that there are, in fact, two distinct types of aging. Aging caused by the genes we inherit is called intrinsic (internal) aging. The other type of aging is known as extrinsic (external) aging and is caused by environmental factors, such as exposure to the sun’s rays.
http://www.skincarephysicians.com/ag...asicfacts.html |
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