Vitamin E or Tocopherol can be derived from many plant oils, especially wheat germ, soy and oat. Vitamin E is an antioxidant that stimulates the immune system. The ozone present in polluted air decreases Vitamin E content in the stratus corneum, accelerating oxidation and destruction of membrane lipids, which in turns causes skin issues. For this reason, it is important to apply tocopherol topically to replenish the Vitamin E lost by the action of ozone on skin.