Skin Photo Aging

Photo-aging is the breakdown of skin cells as a result of cumulative exposure to ultraviolet radiation (UVA and UVB) from the sun. Unlike natural or so-called chronological skin aging, photo-aging causes the skin to become coarse, thickened, wrinkled, and irregularly pigmented. Photo-aging is the single greatest factor causing prematurely aged skin.
The most pronounced effect of sun exposure can be found in the deeper, dermal layer of the skin, where connective tissue called collagen breaks down, thereby creating wrinkles and sagging.