Untitled 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 New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking E Cigarettes, Vaping and Chew FAQ's Medical Clinic Marquette University Cigarettes or vapes, pick your poison Fred Hutch E cigarette vapor linked to cancer in mice National Institutes of Health (NIH)