While there appear to be some sources claiming nicotine does not cause cancer, it is not a closed case as far as I can tell and there appears to be evidence tha

While there appear to be some sources claiming nicotine does not cause cancer, it is not a closed case as far as I can tell and there appears to be evidence that it can be an aggravating factor at least.[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4553893/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4553893/