Sunscreen Primer

We spent so much time last spring hoping the sun would finally come out, we may have forgotten how dangerous our extended time in the sun can be.–corrie

Sunscreen works in one of two ways: It either blends into the skin and absorbs UVA and UVB rays (more on those below), or it sits on top of the skin and reflects damaging rays.

The types that blend into the skin use chemical blockers such as avobenzone and Mexoryl, which can degrade in the heat and through sweat. They must be reapplied regularly if you’re exposed for an extended period of time.

via Issue No. 536: Handling the Heat: Reader Suggestions | Road Bike Rider.

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