What Does A JUUL Really Do To Your Body? Franciscan Health E Cigarette: JUUL Neural IT Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times Use among teens is so rampant that the FDA is officially authorizing all Juul brand flavored e cigarettes to be pulled off the market. Here's what you should know: Teens use Juul e cigarettes much more often than other vaping products