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  2. We asked a dermatologist the most common questions about SPF ...

    www.aol.com/lifestyle/asked-dermatologist-most...

    Sunscreens are formulated to last up to 3 years, however if they are exposed to light or heat, they lose their effectiveness -- like food, sunscreens can expire. First, never use a sunscreen after ...

  3. 3 dermatologists explain why you still need to wear sunscreen ...

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    These are expert-loved sunscreens from Black-owned brands that are perfect for darker skin tones. [Harper’s Bazaar] Window seat? You probably want to wear sunscreen on your next flight. [Yahoo Life]

  4. Does sunscreen expire? Should you wear it indoors ... - AOL

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    How long does sunscreen protection last? In general, sunscreen lasts about two hours. If you’re staying cool and dry indoors and aren’t near any windows, you can stretch that to four to six ...

  5. Are chemical sunscreens safe? Dermatologists reveal what the ...

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    Here, dermatologists discuss the science on chemical sunscreen safety. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail ...

  6. Sunscreen ingredients really do seep into the blood. Is ... - AOL

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    Scientists at the U.S. Food and Drug Administration have shown that active chemicals in sunscreens can readily soak into the bloodstream, confirming the need for more testing on whether these ...

  7. Does sunscreen give you cancer? - AOL

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    Within mineral sunscreens, Spilman also advises using cream-based lotions or sunscreen sticks; while zinc oxide and titanium dioxide do not absorb into the skin like chemical sunscreen, aerosol ...