title: Photoprotection.
abstract: Many agents affect the transmission of ultraviolet light to human skin. These include naturally occurring photoprotective agents (ozone, pollutants, clouds, and fog), naturally occurring biologic agents (epidermal chromophores), physical photoprotective agents (clothing, hats, make-ups, sunglasses, and window glass), and ultraviolet light filters (sunscreen ingredients and sunless tanning agents). In addition, there are agents that can modulate the effects of ultraviolet light on the skin (antioxidants and others). All of the above are reviewed in this article.
  
  
  OBJECTIVE
  At the conclusion of this learning activity, participants should be able to provide an overview of all aspects of photoprotection.
authors.affiliation: Department of Dermatology, Henry Ford Hospital, Detroit, MI 48202, USA.
authors.forename: Prisana
authors.initials: P
authors.lastname: Kullavanijaya
authors.forename: Henry W
authors.initials: HW
authors.lastname: Lim
mesh_terms: D010129:4-Aminobenzoic Acid; D000975:Antioxidants / Q000627:therapeutic use; D001272:Atmosphere; D004777:Environment; D005135:Eye Protective Devices; D006801:Humans; D011481:Protective Clothing; D013471:Sunburn / Q000517:prevention & control*; D013473:Sunscreening Agents; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D000975:Antioxidants; D013473:Sunscreening Agents; D010129:4-Aminobenzoic Acid