Vaping is less harmful than smoking, but it’s still not safe.
E-cigarettes heat nicotine (extracted from tobacco), flavourings and other chemicals to create an aerosol that you inhale. 
Regular tobacco cigarettes contain 7,000 chemicals, many of which are toxic. While we don’t know exactly what chemicals are in e-cigarettes, Bl aha says “There’s almost no doubt that vaping exposes you to fewer toxic chemicals than smoking traditional cigarettes.”
Facts about Vaping
