Does Vaping Harm Eyesight: Effects of E Cigarettes on Vision La Jolla, CA Del Mar, CA GW Eye Associates JUUL More Dangerous Than Cigarettes! Vaping Student Health & Well Being New strong evidence that Juul is more toxic to lungs and hearts than earlier e cigs Stanton Glantz blog 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