why chewing tobacco is harmful for health Side Effects, Risks, Tips on Quitting How Dangerous Is Chewing Tobacco?

Use your fingers to place a small amount of tobacco in one side of your mouth, between your lip and the bottom of your teeth

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The researchers noted that smoking adversely affects preferences for vitamin C rich foods, the inverse association between smoking and serum vitamin C levels occurs independently of dietary intake. This means smokers put themselves in a deep vitamin C hole by an apparent aversion to vitamin C rich foods (whether this is caused by smoking or is merely a characteristic shared by smokers is unknown) while the act of smoking depletes the meager amounts of vitamin C circulating in smokers bloodstreams

PMID 11606795

A clear overview of these communities provides the foundation for interpreting how smoking-induced perturbations translate into local and systemic disease processes