The FDA is allowing vaping brand Juul to keep its e cigarettes on the market. Studies from Juul show its e cigarettes are less harmful for adult smokers, who can benefit from switching completely E Cigarettes Vaping with Juul & Other Electronic Cigarettes JUUL2 Juul Labs Science The Dangers of Juuling National Center for Health Research What Does A JUUL Really Do To Your Body? Franciscan Health All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center