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Water reflects less UV than most people assume — under 10 percent. So why does everyone burn at the beach? The answer is reflection from the wrong surfaces, missing shade, and the spots sunscreen never reaches.
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UVB drops in autumn. UVA barely moves. Here's why dermatologists treat September through March as sunscreen season too — and how to adjust your SPF routine as the weather turns.
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Most people start tanning within 1 to 2 hours of sun exposure, but the color can take hours or days to fully appear. Here's a realistic timeline based on skin type and UV index, plus how to tan without burning.
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