ABSTRACT
Skin is the only organ where signs of aging are evidently visible at the soonest in phenomena like wrinkle formation, loss of elasticity, uneven pigmentation, loss of moisture, increased roughening, and cutaneous itching. Aging itself is understood as the result of a complex interaction of biological processes, which are caused by both genetic (chronological or intrinsic aging) and environmental or behavioral processes (premature or extrinsic aging).
