<![CDATA[Skin aging is multi-factorial phenomenon of reduction in size, number of skin cells, and alteration of many organic skin functions. Skin aging resulted from process deterioration of skin structures and reduction of the normal skin functions. The physiologic changes in aging skin are barrier function impairment, downtime of epidermal cells turnover, reduced vascular network around hair bulbs and glands, and declined functions of cell replacement, immune response, chemical clearance, sensory perception, thermoregulation, and decline production of sweat, sebum, and vitamin D. Xerotic skin is common among aging skin.]]>
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