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 The FDA Just Threatened to Crack Down on E Cig Companies Like JUUL FDA reverses order taking Juul vaping products off the market in US, opens door to possible authorization ABC News FDA approves Juul's tobacco and menthol e cigarettes Reuters