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Deadly Smoke

More than 4,000 chemicals are found in tobacco smoke, including at least 60 chemicals that are known to cause cancer, according to the National Cancer Institute. Some of the chemicals in tobacco smoke become cancer causing after they are activated by certain enzymes found in many tissues in the body. These activated chemicals then become part of the DNA in cells and possibly interfere with the normal growth of cells, the agency says.

Online Medical Reviewer: Godsey, Cynthia M.S., M.S.N., APRN
Online Medical Reviewer: Lambert, J.G. M.D.
Last Review Date: 3/28/2005
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