A Sunscreen Evangelist Explains Why You Need To Get On Board - a podcast by NPR

No matter your skin tone, sunscreen keeps your skin safe from harmful UVA and UVB rays. But to use it right, you need to know a few things: What SPF to use, how often to reapply and the difference between chemical and physical sunscreen. This episode explains what to look for on the back of a sunscreen bottle and how to use it effectively.

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