FDA's proposed e cigarette rules draw mixed review E Cigarette Reviews and Rankings E Cigarettes FDA Threatens E Cig Companies National Review 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 : E cigarettes: Facts, stats and regulations E cigarettes: How they work, risks, and research