Food and Drug Administrationhas called SPF values higher than 50 “misleading to the consumer,” the EWG reports, and has seen no evidence that users get any added benefit as the values keep going up. Aasi agrees with Andrews: “Sunscreen users get a false sense of security.”ĮWG c laim : “There are dozens of high-SPF products but no proof they’re better.” Many dermatologists seem more convinced by the 2011 Australian study than the EWG does, and they consider studies showing an increased risk of melanoma among sunscreen users to be misleading. The EWG also notes that some studies have shown decreased risk of melanoma among sunscreen users, including a 2011 Australian study that, after 10 years, found half as many new melanomas among daily sunscreen users as among those who used it at their own discretion.
#Ewg sunscreen guide no more than spf free#
(Antioxidants are supposed to be good for us because they can neutralize free radicals.) (3) Protection against UVA rays may be what counts with melanoma, and historically many sunscreens have offered little or no protection against UVA rays. (2) Some sunscreen chemicals break down in sunlight and release free radicals, which are unstable molecules thought to be involved in the development of cancer. “I think this is because when using sunscreen, people change their behaviors and feel much more invincible,” says David Andrews, a senior scientist at EWG. They offer three possible explanations for this surprising result: (1) Sunscreen users stay out in the sun longer and end up exposed to more UV radiation than non-users.
#Ewg sunscreen guide no more than spf skin#
The deadliest form of skin cancer is melanoma, and the EWG cites studies showing an increased risk of it among sunscreen users. They’re not everything, but a part.”ĮWG claim: “There’s some evidence that sunscreens might increase the risk of the deadliest form of skin cancer for some people.” Still, Aasi is satisfied that evidence shows a correlation, at least, between sunscreen use and reduced cancer risk. But, she contends, definitive proof that sunscreens prevent skin cancer would require one group of people to use sunscreen - regularly, properly - and another group not to use any, with the two groups spending the same amount of time exposed to the same amount of UV radiation over their lives. Sumaira Aasi, associate professor and director of dermatologic surgery at Stanford University. Also, while new federal rules slated to take effect in December allow sunscreen makers to claim that their products lower the risk of skin cancer, they will not allow makers to claim their products do so alone - that is, without other protective measures. The EWG says regular sunscreen use has been shown to reduce risk for squamous cell cancer (treatable comprises 16% of skin cancers) but not necessarily for basal cell cancer (treatable 80%) or melanoma (potentially deadly 4%). A look at some of the EWG claims may shed a little light.ĮWG claim: “There’s no consensus that sunscreens prevent skin cancer.”
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