FDA OKs first menthol e cigarettes, citing potential to help adult smokers E cigarettes more effective than other smoking cessation aids, new review finds Nuffield Department of Primary Care Health Sciences University of Oxford InSight+ Damning review of e cigarettes shows vaping leads to FDA OKs first menthol e cigarettes, citing potential to help adult smokers E cigarettes: How they work, risks, and research E cigarettes and harm reduction: An evidence review RCP