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Avon sunscreen study

This article was originally published in The Rose Sheet

Executive Summary

UVB sunscreens and "broad spectrum" claims for UVA products are "not adequate indicators of a product's protection against all UV wavelengths," a joint study by Avon Products and Ivy Labs (Philadelphia) concludes. Sixteen subjects with differing skin types were treated with either a conventional or full spectrum sunscreen or were left untreated. An unirraddiated control group was also used. A low-level UVA I dose of 20 Joules/cm2 was delivered nine times over two weeks. Although the full spectrum products block out 90% of UVA I, there was still enough to activate the melanocytes, the researchers state. While full spectrum sunscreens with the active ingredient avobenzone blocked more UV-induced sunscreen pigmentation than conventional sunscreens, "it did not completely prevent it," the researchers conclude
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