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Your powder sunscreen questions, answered

How long does powder SPF last and how often should you reapply it?

Powder sunscreen usually lasts a few hours depending on your activity, according to Brooke Jeffy, MD, a board-certified dermatologist based in Arizona. “You should reapply sunscreen every two hours, and more often if you’re sweating or swimming, exercising, or perspiring heavily,” she says.

Can you apply powder sunscreen to your scalp?

Since some greasy sunscreen formulas can clog your pores and follicles on your scalp, dermatologists say that powder sunscreen is a great format for your scalp. “This area is actually very high-risk for skin cancer as it’s one of our most exposed areas of the body, and also one where it’s hardest to detect early signs of skin cancer,” says Dendy Engelman, MD, FACMS, FAAD, board-certified cosmetic dermatologist and Mohs surgeon in NYC. This is why it’s key to apply sunscreen on this area, and a powder option makes the process easy.

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