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For the second time in less than a year, a study of common sunscreen ingredients has established that the chemicals are absorbed into the bloodstream at concentrations far greater than the Food and Drug Administration’s safety threshold.
According to the FDA, if active ingredients are found in the blood at a level of 0.5 nanograms per milliliter or higher, they should be analyzed to determine whether they increase the risk of cancer, birth defects or other adverse effects.
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