Why does chronic sun exposure accelerate skin aging regarding elastin function?

💡 Explanation

Chronic sun exposure leads to increased levels of matrix metalloproteinases (MMPs). MMPs degrade elastin fibers within the dermis, because they break down the extracellular matrix. Therefore, elastin fibers are reduced, causing loss of elasticity and accelerated skin aging, rather than increased fibroblast activity or changes in hyaluronic acid.

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