What Causes Aging?
Aging is a natural and continuous biological process, and skin inevitably changes with age. In the case of beauty industry, the word aging means dermal aging or simply aging skin. Dermal aging is a type of physical aging, it is caused by both intrinsic and extrinsic factors.
Intrinsic factors progress as a consequence of growing older and altered skin cell function results in fine lines, wrinkles, skin thinning, decreased skin ability in wound healing, and an increased susceptibility to wounds that fails to heal. Whereas extrinsic factor is an aging process caused by radical action, stress, ultraviolet rays and other environmental. It is characterized by skin thickening, rough texture, coarse wrinkles and age spots.