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 How are Non Combusted Cigarettes, Sometimes Called Heat Not Burn Products, Different from E Cigarettes and Cigarettes? FDA The evidence keeps piling up: e cigarettes are definitely safer than smoking Science The Guardian E cigarettes may be harmful to health an annotated graphic Engineering & Technology magazine