I'm curious about why you insist on VG base. Glycerine is not approved for inhalation anywhere on the planet, where propylene glycol has been used on all
tobacco products for a century and is approved for inhalation. Worried about allergies? Did you break out in a rash when you smoked? If not, why do you think you'll all of a sudden be allergic now?
Glycerine is almost universally a synthetic product. Calling it "VG" is good marketing, nothing more significant than that. Glycerine costs roughly half that of propylene glycol but "VG" and "Non-PG" liquids aren't cheaper.
Just curious about what the attraction is to glycerine..?