Frank T. Leone, MD, director of the Comprehensive Smoking Treatment Program, voiced his concerns about e-cigarettes in a recent Huffington Post article, citing everything from the unknown health risks to their merits in smoking cessation. A top concern is the nicotine delivery rate. With traditional cigarettes and e-cigarettes, which also have nicotine, heat creates a freebase form of nicotine that is more addictive. Once addicted, the body will crave nicotine. Leone also said that e-cigarettes might not help people quit smoking because the device keeps addicts in a state of ambivalence -- the illusion of doing something positive to mitigate the guilt that comes from smoking, but all the while maintaining the ritual of smoking.
LiveScience article via the Huffington Post