Juul can continue to sell e cigarettes, FDA says What's actually in an e cigarette? Nicotine formula used by e cigarette maker Juul is nearly identical to the flavor and addictive profile of Marlboro cigarettes : r science Canadian scientists exposed mice to vapour from JUUL e cigarettes and found it caused changes in the animals' pulmonary immune cell composition and altered gene and protein levels in their lungs. : r science Zombie Vape Pods Found in Yishun Flat