Tuesday, May 22, 2012

Another Reason To Wear Sunscreen

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Ultra Violet radiation (UV) is a known carcinogen, and both UVA and UVB have been linked to skin cancer, premature aging, compromised immunity, and cataracts.

A study in the JAAD reported that up to 90% of the visible signs in aging skin are directly caused by chronic sun exposer.*   UVA rays, also known as “aging rays” are not absorbed by the ozone.  UVA penetrates the deeper layers of skin, known as the dermis, breaking down the structures that give our skin strength, resilience, and elasticity.  UVB rays, otherwise known as the “burning rays,” penetrate the skin’s superficial layers, and are primarily responsible for sunburn. UVB rays are partially absorbed by the ozone layer, but with the thinning of the ozone, our skin is at greater risk from the effects of UVB radiation.  

*Taylor, C.R. et al, Photoaging/Photodamage and Photoprotection, J Am Acad Dermatol, 1990: 22: 1-15.