Sunscreens act as a barrier to solar ultraviolet radiation They are said to reduce the chances of developing sunburn and the risk of skin cancer. Ingredients that exclude UVA rays include oxybenzone, avobenzone or Parsol 1789 Ingredients that exclude UVB rays include cinnamates and salicylates Ingredients like zinc oxide which is a natural material, deflects light and this and titanium dioxide are both used in highly effective sunscreens.
