We were shocked': Vaping considerably increases lung cancer risk among people who smoke 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 70 of the 7 Thousand Chemicals in That Smoke Cause Cancer Yeditepe niversitesi Hastanesi Vaping can cause cancer, say researchers but still isn't as damaging as smoking cigarettes. More than 5.5 million Britons currently use e cigarettes, which have long been viewed as a safer alternative