Vaporfi produce all their e-liquids in their US based FDA registered lab. Vaporfi strictly adhere to cGMP operation standards. Vaporfi e-liquids are made up of “better than food grade” ingredients and have been approved by GRAS. All Vaporfi E-Liquid ingredients are also USP grade kosher. Another fact which I really liked is that all the Vaporfi e-juices are diacetyl-free. They quality is of the highest calibre we have seen so far!