So now that the sun is occasionally peeking out around the Bay Area, it’s time to lather on the block. A recent study from the Environmental Working Group, though, warns that sometimes our sunscreen doesn’t work the way we think it does. You’ll thank us after you read our handy guide.

Choose a Sunscreen With UVA and UVB Blockers

UVB rays are what make your skin burn; UVA will give you melanoma. Most sunscreen protect against sunburn when used correctly, but the EWG study found that many do no protect against skin cancer.

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