UVA and UVB Irradiation Destroys Cutaneous Vitamin E

Skin excisates of hairless mice were irradiated with UVA: 6J/cm² for 10 minutes. ^{REF 119 & REF 120}

This study showed that irradiation has a marked influence on the amount of vitamin E in the skin and that a reduction is clearly seen after the skin was subjected to UVA and UVB rays - and from that we can conclude that sunlight destroys vitamin E in the skin.

Depletion of Lipophillic Antioxidants in Human Skin Equivalents by Exposure to UV light.

Human skin equivalent: dermal fibroblast and keratinocytes grown together on a nylon mesh. Concentrations measured 1 hour after irradiation. ^{REF 121}

This study looked at the destruction of various antioxidants, when subjected to full solar UV spectrum (UVA and UVB, 280-400 nm) and a linear decrease in alpha-tocopherol (vitamin E) occurred at approximately 1.7 pmol tocopherol/cm2 surface were destroyed per J/cm2 UV-light.

Other vitamin E tests on the skin

• Absorption of vitamin E by the skin
• Sunlight destroys vitamin E in the skin
• Vitamin E helps prevent free radical damage to the skin
• Vitamin E and the formation of sunburn cells