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 Study: Juul Pods Contain Caffeine. What's It Doing There, And What Does It Do? What's In Fake Juul Pods? 4 Signs Your Juul Pod Is Fake FDA orders Juul to stop selling e cigarette products The FDA's Juul Ban May Not be a Pure Public Health Triumph