70 of the 7 Thousand Chemicals in That Smoke Cause Cancer Yeditepe niversitesi Hastanesi PDF) E Cigarette Use and Symptoms of Depression and Anxiety Among US Middle and High School Students Unraveling the Truth: Is Nicotine Truly a Depressant? Vaping and the use of e cigarettes are likely to cause cancer, according to a new study published by the University of New South Wales on 30 March. The study, which brought together