does cigarettes contain tobacco Tobacco/Nicotine Tobacco companies have made cigarettes

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Cigarette tobacco undergoes extensive processing that includes blending, chemical treatment, and the addition of humectants (like glycerin) to control moisture and preserve freshness

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Materials and methods Chemicals Nicotine used for exposure, ( )-Nicotine 99% (GC), was purchased from Sigma-Aldrich Chemie GmbH (Germany)