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When "reapplying" sunscreen is it necessary to wait 30 minutes before sun exposure? Or, can I...

When "reapplying" sunscreen is it necessary to wait 30 minutes before sun exposure? Or, can I reapply sunscreen while I'm already outside in the sun?

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Answer #2

Yes, reapplying sunscreen is necessary before sun exposure and already outside in the sun.

EXPLANATION:- Application of sunscreen:-
The AAD (American academy of dermatology) suggests that sunscreen should apply whenever you expect more than 20 minutes of sun exposure.
-Sunscreen should be applied at least 15 to 30 minutes before going outside and reapplied at least every two hours.
-Reapplying sunscreen more frequently if you are swimming or exercising outdoors.

=> The SPF (sun protection factor) measures how much the sunscreen protects from ultraviolet (UV) rays.
E.g.-the higher the SPF , the more protection.

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