Why Most Sunscreens Don T Work
Rankings in the July 2007 issue of Consumer Reports revealed a similar problem: not all sunscreens are created equal. Rather, they found that sunscreens with the same sun protection factor (SPF) ran the gamut from “excellent” to “poor” in their overall ability to block ultraviolet rays. While many people rely solely on SPF when selecting a sunscreen, these rankings show that the single number only tells half the story. SPF measures a sunscreen’s ability to block UVB rays....