“There is no clear evidence that e-cigarettes help with smoking cessation and the lack of FDA regulation has led to the use of at least 19 harmful chemicals in the devices, some that are cancer-causing carcinogens.”

http://www.sciencedaily.com/releases/2014/01/140129164653.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily%2Fmind_brain%2Faddiction+%28Addiction+News+–+ScienceDaily%29