Nicotine e cigarettes are more effective in helping people quit smoking than conventional nicotine replacement therapy (NRT), according to the latest review of 88 studies (from US, UK, Italy) and more than 27,235 participants : Electronic CigarettesA Narrative Review for Clinicians ScienceDirect Comparing E Cigarettes and Traditional Cigarettes in Relation to Myocardial Infarction, Arrhythmias, and Sudden Cardiac Death: A Systematic Review and Meta Analysis Mohammed I. Yacoub, Aziz Aslanolu, Fadi Khraim, Anas Alsharawneh, Raghad Abdelkader, E cigarette use alters respiration but does not impair lung function, according to new findings