ABSTRACT
Perhaps no aspect of aging is as dramatic or readily obvious as that which occurs in the skin and its appendages. The development of either gray hair or facial and body wrinkles represents irrefutable evidence of the passage of time and the aging process. Many descriptions of aging skin fail to distinguish between intrinsic aging changes and changes caused by environmental insults that accumulate with exposure time. For example, chronic solar damage changes are far more prevalent in the elderly because they result from cumulative exposure over time.
These changes involve cells,
