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Oral cancer, mouth lesions, gum disease and tooth decay are the most common dental problems caused by smokeless tobacco

[PubMed] [Google Scholar] 10.Aberle DR, Adams AM, Berg CD, Black WC, Clapp JD, Fagerstrom RM, et al

Like other undeclared additives in the composition of cigarettes, such as liquorice or honey, menthol remains one of the ingredients most used by the tobacco industry, at reduced levels so as not to be included among the "characterizing aromas"

This is highly consistent with findings from Stephens et al

This said, we don't have any long term studies on the effect of chewing betel leaf alone

Currently, the detection of CBRs on mast cells has been inconsistent