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"Broad spectrum" is the most important phrase on a sunscreen label — and the most misunderstood. Here's what it means, why UVA and UVB are different, and how to choose right.
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Your windshield blocks most UV, but your side window doesn't. Here's why drivers get more sun damage on their left side, and how to protect your skin behind the wheel.
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Yes — UVA rays pass through glass and clouds. Here's when you really need sunscreen indoors and on overcast days, and when you can skip it.
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