"We use industry standard methods, so it's hard for criticism to stand," Sutton said.
EWG's ratings were based on three factors: UVB protection, which SPF indicates; UVA protection, which blocks the more harmful rays; and overall stability of the ingredients. The group recommends that sunbathers search for products with zinc oxide and titanium dioxide, which are less readily absorbed by the skin and provide more of a physical barrier between users and the sun. While these minerals may be safe on your skin, they're not so great in your lungs. So give the spray and powder versions a pass, and beware products that have been reduced to nanoparticle size.
And, of course, spend more time in the shade.