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 E cigarettes: How they work, risks, and research E cigarettes a tool to reduce inequalities in smoking? UCL Institute of Epidemiology and Health Care Blog E Cigarette How E Cigarettes Work, Health Risks & Teen Use Why E Cigarettes may Not Help Quit Smoking: Study