E cigarette smoke found to contain toxic metals USC Today New data show nearly 800,000 teens vaped for the first time in the past year, as FDA is set to announce first major decision to remove a popular e cigarette brand How are Non Combusted Cigarettes, Sometimes Called Heat Not Burn Products, Different from E Cigarettes and Cigarettes? FDA How E Cigarettes Work Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times E cigarettes can produce more formaldehyde than regular cigarettes, study says Los Angeles Times