The sun itself causes chemical sunscreens to break down—which is - TopicsExpress



          

The sun itself causes chemical sunscreens to break down—which is why you need to reapply! It might sound counterintuitive, but the chemicals in sunscreen that protect you from UV rays are themselves susceptible to sun damage. The only sunscreens that don’t break down when exposed to the sun are the physical ones—zinc oxide and titanium dioxide. Whatever type you choose, sunscreen should be the number-one part of your beauty regimen. If you use chemical sunscreens, remember that you must reapply every two hours you’re out in the sun.
Posted on: Wed, 03 Jul 2013 15:15:16 +0000

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