Ultraviolet radiation accelerates NRas-mutant melanomagenesis: A cooperative effect blocked by sunscreen.

When corrected for application amount (see Methods ), none of the active ingredients studied correlated with the ability of a sunscreen to delay melanoma onset; however, sunscreens with higher homosalate or avobenzone levels showed a trend toward better performance ( Figure S2 ; p = .067 and .074, respectively).

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