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High SPF Sunscreens Increase Sun Exposure By 25%, Cancer Study Finds

This article was originally published in The Tan Sheet

Executive Summary

Individuals who use SPF 30 sunscreens stay in the sun 25% longer than those using SPF 10 sunscreens, according to a study published in the Journal of the National Cancer Institute Aug. 4. The study's SPF 30 sunscreen group spent 1,075 hours sunbathing, compared to the SPF 10 group, which clocked in 852 hours of sun exposure.

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Use of warning labels on sunscreens to inform consumers UV damage may occur despite use was strongly recommended by Michael Holick, MD/PhD, Boston University School of Medicine, at the National Institutes of Health research workshop on UV risks and benefits in Bethesda, Md. Sept. 17.

AAD counters Berwick analysis that skin cancer may occur regardless of sunscreen use.

AAD COUNTERS CLAIM THAT SKIN CANCER LIKELY REGARDLESS OF SUNSCREEN USE in a March 12 letter from former President Roger Ceilley, MD, to epidemiologist Marianne Berwick, PhD, Memorial Sloan-Kettering Cancer Center. Ceilley's letter responds to a presentation given by Berwick before the American Association for the Advancement of Science in which she claimed study data suggest some individuals are "likely to develop skin cancer regardless of the amount of sunlight exposure or protection from sunscreen." In Ceilley's letter, the American Academy of Dermatology maintains "there are no data to support that statement."

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