FDA regulators said Juul's studies show its e-cigarettes are less harmful for adult smokers, who can benefit from switching completely to vaping.

The U.S. Food and Drug Administration has authorized the sale of Juul Labs' e-cigarette device and refill cartridges in tobacco and menthol flavors, after years of struggle with heightened regulatory scrutiny,

FDA regulators said Thursday that Juul’s studies show its e-cigarettes are less harmful for adult smokers, who can benefit from switching completely to vaping.