Juul Labs Inc., a San Francisco-based company facing several lawsuits from across the country and who U.S. Surgeon General Jerome Adams in December singled out when saying vaping could lead to lifelong addiction, is now facing a joint investigation by the Office of Connecticut Attorney General William Tong and the state Department of Consumer Protection.

The thrust of the probe is to determine whether Juul’s marketing and sales practices were proper, including claims that Juul helps smokers quit smoking and that’s is a smoking cessation tool, despite lack of FDA approval.