Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Strongest evidence yet that vaping likely causes cancer Vaping Likely Causes Cancer, Major Study Finds : ScienceAlert A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews Scientific review finds e cigarettes likely cause lung and oral cancer