New strong evidence that Juul is more toxic to lungs and hearts than earlier e cigs Stanton Glantz blog Juul vape: What is it, why are teens addicted, and is it safe? CNET FDA orders Juul e cigarettes off the market over safety concerns The Washington Post Effects of Aftermarket Electronic Cigarette Pods on Device Power Output and Nicotine, Carbonyl, and ROS Emissions Chemical Research in Toxicology