Blood tests reveal tobacco smoke residues in non-smoking New Yorkers
Wednesday, April 8, 2009 - 10:49
in Health & Medicine
More than half of non-smoking New Yorkers have elevated levels of cotinine in their blood - meaning that they were recently exposed to toxic second-hand smoke in concentrations high enough to leave residues in the body. Cotinine, a by-product of nicotine breakdown, is not harmful itself but signals exposure to environmental tobacco smoke.
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