With world temperatures reaching record highs this summer, you may want to reconsider which sunscreen you are using, experts say.
Sunscreens are not all the same. The two major types — mineral and chemical — handle the sun's ultraviolet rays differently, and during extremely hot weather, those differences can matter.Mineral sunscreens contain zinc oxide or titanium dioxide. They create a barrier that reflects UV light before it penetrates the skin. Because mineral sunscreens aren't absorbed, older formulations often had a greasy feel and a white appearance.
Ultimately, the chemicals themselves are absorbed into the bloodstream, and health officials say more research is needed to understand the safety impacts of long-term use.Ordinarily, "the best type of sunscreen is the one you will use again and again," the AAD advises on its website. Chemical sunscreens can lose their filtering abilities when exposed to extremely high temperatures, said Radusky, who is also an American Academy of Dermatology spokesman.
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