Some makeup companies are reformulating their sun-protection ingredients or dropping claims for blocking harmful rays altogether, following stricter Food and Drug Administration standards on SPF labeling. Now, "broad spectrum protection" claims must be backed up by formulas that screen both UVB and UVA rays. Further, say experts, relying on makeup alone to protect against the sun is a poor bet. "[I]f you put on foundation, it's thicker in some places and thinner in some places," says Dr. Jeanine Downie, a dermatologist based in Montclair, N.J.
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