New FDA regulations for sunscreen labels will help consumers understand what they are purchasing and set standards for what "broad spectrum" means, dermatologists say. Current SPF numbers reflect only the level of protection against UVB rays, but exposure to UVA rays also causes cancer and premature aging, says dermatologist Daniel Ladd. "We've never had a quantifiable definition of UVA protection, so that's the best thing that's come out of this, in my opinion," said dermatologist Rutledge Forney.

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