Aging is a process of the decrease in structum and tuiction of the organism, influenced by extrinsic and intrinsic factors. Some of the extrinsic factors are environmental factors like climate, sun light, free radicals, nutrition, smoking, alcohol and skin care abuse. While intrinsic factors are nices, genetic and hormonal. Races and genetic factors can not be changed, but hormonal factor can now be manipulated by using hormone replacement therapy. The honnone which influence the process of skin aging is estrogen. Estrogen is_nroduced mostly by the ovaria and in small amount by the adrenal cortex, testes and placenta. When women reach the age of 40-45 years, it is usually called premenopause, ovarium function decline causing a decresase in...