Why some sunscreens may not fully protect against harmful rays
American group puts some leading sun cream brands in its 'Hall of Shame', but manufacturers and some dermatologists question its methodology. We try to make sense of the issue
The not-so-good news: four in five sun protection products offer "inferior sun protection or contain worrisome ingredients", according to a new report by a non-profit environmental research organisation in the US.
The Environmental Working Group (EWG), based in Washington, reviewed more than 1,700 products such as sunscreens, lip balms and moisturisers that boast a sun protection factor, or SPF, which refers to protection against sunburn-causing UVB rays.
In its report released two weeks ago, the group highlights two chemicals - oxybenzone, which can disrupt the hormone system, and retinyl palmitate, a form of vitamin A that is linked with skin damage.
Other dangers flagged include spray-on sunscreens, which they say may not be safe or effective, and SPF values over 50+, because SPF allegedly tops out at 30 to 50.
"EWG's Sunscreen Guide for 2015 - the 9th annual edition - finds persistent problems with the ingredients and marketing of sunscreens for the American market," reads the report.