Smoking vs. Vaping Weed: Know the Facts Hackensack Meridian Health Research so far shows that legal e cigarettes are far less harmful than smoking, and can be an effective way of helping people who smoke to quit. However, there isn't enough research yet Research & Commentary: Despite Scientific Evidence, More Americans Believe E Cigarettes Are as Harmful as Tobacco Cigarettes The Heartland Institute Few adult smokers and non smokers think e cigarettes have lower levels of harmful chemicals than cigarettes, finds study