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The Food and Drug Administration has rolled out a proposed rule to require tobacco companies to include graphic warnings, depicting some of the lesser known health risks of smoking tobacco products.
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Among the possibly harmful compounds are "acetals," which form when some ingredients combine on the shelf, researchers say, and can inflame airways when inhaled.
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The Food and Drug Administration, which requested the recall, is not recommending that people who already have Allergan's Biocell implants get them removed unless there are symptoms or problems.
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Researchers are using brain scans, blood and spinal fluid to detect early signs of Alzheimer's disease. These "biomarkers" may also offer a quicker way to test new Alzheimer's drugs.
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