Most Sunscreens Don't Measure Up, Report Says

Just 20% of beach and sport sunscreens can be trusted to provide the protection they claim, an environmental advocacy group has found.

The nonprofit Environment Working Group recently released its fifth annual Skin Deep Sunscreens report, which examined more than 1,700 sunblocks, lip balms, moisturizers and make-up products that list a sun protection factor -- more commonly known as an SPF -- on its packaging.

To determine the rankings, the EWG looked at five factors, including potential health hazards of listed ingredients; UVB protection; UVA protection; the balance of UVA and UVB protection; and the sunscreens stability, or how quickly the ingredients break down in the sun. The group then ranked the sunscreens from 1 to 10, with 1 being the best.