Vaping exposes users to more toxic metals than smoking cigarettes FDA permits the marketing of an e cigarette for the first time, paving the way for vaping products to be legally sold in the U.S. Roswell Park Comprehensive Cancer Center Buffalo, E cigarettes less addictive than cigarettes, PATH study shows Penn State University The Rise of Vaping: Why SMOK E Cigarettes Are Leading the Market Vibe Medina Do you know what's in a vape? Puff Bar Vape E Cigarettes Could Face FDA Crackdown