He doesn't smoke and tells me it's not dangerous but I wonder
The analysis revealed that Capnocytophaga , Prevotella , Selenomonas , Actinomyces , Veillonella , Peptostreptococcus , Granulicatella , Campylobacter , Pseudomonas , and Catonella were among the top 10 genera in tobacco products, and these were differentially abundant in OSCC samples
Alternative tobacco and nicotine products, including nicotine replacement therapy (NRTs), ENDS, e-cigarettes, and low-nitrosamine smokeless tobacco, are self-help and less invasive methods that can help with smoking cessation by reducing withdrawal symptoms [26, 27]
Health Affairs, November/December 2005, Volume 24, number 6, funded by the American Legacy Foundation and the National Cancer Institute noted that candy flavors were also added to smokeless tobacco products, cigars and cigarette rolling papers
The escalation can deepen physiological dependence and make discontinuation more challenging, even when withdrawal symptoms are relatively mild compared to other substances