Tuesday April 21, 2009
Cancer "Culprits" in Tobacco Smoke Revealed
Julie Steenhuysen
Reuters
Scientists have detected two substances in tobacco smoke that directly cause lung cancer, and they said on Sunday the finding may help one day predict which smokers will develop the disease.
They said people with high concentrations in their urine of a nicotine byproduct called NNAL had double the risk of developing lung cancer compared to smokers with lower NNAL concentrations in their urine.
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