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SPF 100 sounds twice as strong as SPF 50, but the real difference is tiny. Here's what the SPF number means and what actually matters more.
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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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The lips, ears, scalp, eyelids, and tops of your feet are the most-missed sunscreen spots. Here's how to protect every one of them.
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One of the most common reasons people skip sunscreen is the fear it will cause a vitamin D deficiency. Here's what dermatologists and real-world research actually say — and why you don't have to choose between protected skin and healthy vitamin D.
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Yes, sunscreen expires — usually after about three years. Learn how to read the date, spot the warning signs of an SPF gone bad, and store it so it actually protects your skin.
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Sunscreen shouldn't leave dry skin tight or flaky. Here's how to choose a hydrating SPF and the application tricks that keep skin comfortable all day.
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