Content and quantity of the chemical substances in e cigarette Download Table Electronic cigarettes drastically reduce exposure to toxic substances from tobacco Prevention Observatory of the Montreal Heart Institute Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. Composition of electronic cigarette aerosol Wikipedia E Cigarettes and Secondhand Aerosols Smoke Free At Home NM E cigarette and vape aerosols contain harmful substances. Stay informed! Contact MHealthy's Tobacco Consultation Service for more information: mhealthy.umich.edu tobacco