McKinsey & Company was hired by JUUL to investigate teens' favorite flavors of e cigarettes. Their survey's conclusion was that kids liked mint e cigarettes and would switch to those if other flavors were E cigarettes less addictive than cigarettes, PATH study shows Penn State University Arme concentr e liquide TJuice, arme concentr pour cigarette lectronique Le Petit Vapoteur How McKinsey Got Into the Business of Addiction The New York Times