Vaping: how safe is it? Tobacco Did you know #vaping liquids contain formaldehyde and metals? What else isn't the vaping industry not telling you? Facebook E cigarettes 'expose smokers to more formaldehyde than regular tobacco' South China Morning Post La cigarette lectronique rduit drastiquement l'exposition aux toxiques du tabac Observatoire de la prvention de l'Institut de Cardiologie de Montral E cigarettes can produce more formaldehyde than regular cigarettes, study says Los Angeles Times