Age Spots
Intrinsic aging and extrinsic aging are terms used to describe cutaneous aging of the skin. Intrinsic aging is influenced by internal physiological factors alone, and extrinsic aging by many external factors. The effects of intrinsic aging are caused primarily by internal factors alone. It is sometimes referred to as chronological aging and is an inherent degenerative process due to declining physiologic functions and capacities. Such an aging process may include qualitative and quantitative changes and includes diminished or defective synthesis of collagen and elastin in the dermis. Extrinsic aging of skin is a distinctive declination process caused by external factors which include ultra-violet radiation, cigarette smoking, and air pollution, among others. Of all extrinsic causes, radiation from sunlight has the most widespread documentation of its negative effects on the skin. Because of this, extrinsic aging is often referred to as photoaging.Photoaging may be defined as skin changes caused by chronic exposure to UV light. While developing products to fight with aging of skin, scientists should pay attention to prevent future damages as well as treating the current conditions.
Development of Age Spots:
