Food and Drug Administration. what are v2 cigs Potential Health Concerns, But Limited Data on ECIG Safety Also known as “electronic nicotine delivery systems,” ECIGs consist of a heating element that turns an “e-liquid” solution into vapor, which the user inhales. The ECIG solutions typically contain nicotine, but not always. E-cigarette models vary widely in design and appearance — some resemble cigarettes, but a wide range of other designs and configurations are available.
read full: http://www.sciencedaily.com/releases/2014/08/140805131823.htm