Currently sunscreen manufacturers use an SPF system to tell you how much sun protection there is in that product. But that's in regard to UVB light which protects against sunburn, not UVA. And since UVA light can also lead to skin cancer and premature aging, FDA officials said there should be some way to inform consumers about that risk as well.
So the FDA is recommending manufacturers conduct two tests that will assess how well their product protects against both types of rays. They are also proposing a star rating system that will depict the level of UVA protection, with one star meaning low and four starts meaning high.
But don't look for stars on those bottles yet. The FDA says it may take up to 2 years for manufacturers to do all the testing and bring in the star system.