what is the active ingredient in tobacco that causes addiction Most products, including e-cigarettes, contain nicotine, a chemical can harm heart, brain and whole body. As with other addictive products, using a nicotine product builds tolerance, leading to more Smokeless tobacco and cigarette smoking:
Smokeless tobacco and cigarette smoking: chemical mechanisms and cancer prevention Nature Reviews Cancer Tobacco Nicotine Rutgers Addiction Research Center (RARC) Common used Chemicals in cigarettes But we still smoke Tobacco : Behind the Smoke (infographic)
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