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According to the MD Anderson Cancer Center, an SPF 15 sunscreen blocks 93% of the sun’s harmful UVB rays, and SPF 30 blocks 97%. Once you get higher than that, you’re only getting a small ...
The American Academy of Dermatology recommends using a sunscreen that offers a minimum protection of SPF 30, broad-spectrum coverage so it will properly defend against UVA and UVB rays, both of ...
The most simple way of thinking of it is an SPF 15 filters out 93 percent of UVB light while a SPF 30 filters out 97 percent of UVB light. ... you are maximizing your UVB protection while using a ...
As part of revised guidelines for sunscreens in the EU, there is a requirement to provide the consumer with a minimum level of UVA protection in relation to the SPF. This should be a UVA protection factor of at least 1/3 of the SPF to carry the UVA seal. [90] The 1/3 threshold derives from the European Commission recommendation 2006/647/EC. [91]
Does SPF really matter? ... As a general rule of thumb, you should use SPF 30 or higher for true protection, and you should use about the size of a nickel (at least) to cover your face.
An SPF of 30 can provide 97 percent UVB protection. But remember: “This is predicated on applying a thick and even coat of sun protection on the skin and reapplying every two hours,” says Dr ...