Vaping may not contain tobacco, but that doesn't mean it's harmless. E cigarettes still expose your lungs to nicotine and a mix of chemicals that have been linked to lung disease, heart issues, 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 Interdisciplinary Study Finds Vaping Likely Causes Cancer Labcompare.com The Scary Truth About Teen Vaping Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA