The FDA said last month it was considering a ban on flavored e-cigarettes from Juul and others as the agency grapples with an “epidemic” of youth e-cigarette use that threatens to create a new generation of nicotine addicts. Retail sales of Juul grew more than seven-fold from 2016 to 2017, according to a study by the U.S. Centers for Disease Control and Prevention (CDC). By December, Juul comprised nearly 1 in 3 e-cigarette sales nationally, it said.