Slide show: Sun damage
Image of solar elastosis
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Ultraviolet radiation breaks down the skin's connective tissue — collagen and elastin fibers — that lies in the deeper layer of skin (dermis). Without the supportive connective tissue, the skin loses its strength and flexibility. This condition, known as solar elastosis (e-las-TOE-sis), is characterized by vertical creases, deep wrinkles, and loose or sagging skin.

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