This book focuses on skin photoaging, the premature aging of skin due to environmental effects such as exposure to UV (UVA, UVB) radiation from the sun. Slowing the aging process and rejuvenation have been one of the major goals of medicine and are in high demand as consumers seek agents or treatments that can prevent or reverse age associated changes in the skin. Skin Photoaging reviews the compounds and modalities that have been show (or have potential) to improve the appearance of prematurely aged skin.