When speaking about sunscreen use, it is common to hear, “I don’t wear it because I don’t go outside much.” What about the sun exposure you are getting when you are not outside?
A know source of UV exposure is through windows in the car, at home, or at work. It is a long standing observation that people tend to have more sun damage (skin cancers, brown spots, and wrinkling) on the left side of their face and body. This is no coincidence, and research points to UV exposure through car windows.
90 percent of all skin cancers are associated with UV exposure in both its UVA and UVB form. Glass effectively blocks UVB, and car windshields are specially treated to block UVA rays also. Unfortunately building windows and the stock glass used for car’s side and rear windows allow UVA to penetrate. This indirect source of UV damage is often unaccounted for, and is cumulative over time.
Aside from wearing a broad spectrum sunscreen daily that covers both UVA and UVB rays, another form of protection is window tinting for car, office, and home windows. Depending on the tint selected, it can block up to 99.9 percent of both UVA and UVB rays.
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