E cigarettes can help people quit smoking but may be gateway for non smokers, studies suggest ABC News Best E Cigarettes to Quit Smoking E Cigarette Reviews and Rankings Vaping is not replacing smoking. It is often added to it. This is called dual use. Nearly half of e cigarette users still smoke cigarettes. What this means: Smoking continues alongside vaping How to Quit Vaping: A Practical Guide Latest Cochrane Review finds high certainty evidence that nicotine e cigarettes are more effective than traditional nicotine replacement therapy (NRT) in helping people quit smoking Cochrane