Hidden Formaldehyde in E Cigarette Aerosols New England Journal of Medicine Some e cigarettes deliver a puff of carcinogens WHAT'S REALLY INSIDE YOUR VAPE? You wouldn't drink paint thinner or eat car battery fluid, right? But you might be inhaling their ingredients every time you vape! E cigarettes contain toxic chemicals Daily exposure to formaldehyde and acetaldehyde and potential health risk associated with use of high and low nicotine e liquid concentrations Scientific Reports E cigarettes 'expose smokers to more formaldehyde than regular tobacco' South China Morning Post