In March 2015 a policy statement about electronic nicotine delivery systems (ENDS) from the American Association for Cancer Research and the American Society of Clinical Oncology, stated that the use of electronic nicotine has quickly increased. It is unclear that nonsmokers or former smokers will use these combustible tobacco products. These devices may even discourage smokers from quitting.
Additionally, new research out of the University of California San Diego says smokers who try e-cigarettes to help them quit may in fact be less likely to quit. Smokers in the study who had tried e-cigarettes were found to be half as likely to cut back on cigarette use and 59% less likely to quit. While the study's author says more studies are needed, one possible reason for the findings is that smokers using e-cigarettes may be receiving an increase in nicotine over those not using e-cigarettes.