What does PG and VG stand for?

[Adrian]

honestly i dont know if my research skills are horrible, but i cant figure it out.

 

[DonDaBoomVape]

Either or both are the base liquids that are vaporized (and into which the nicotine and flavoring are mixed):

• PG is Propylene Glycol (USP-grade) is used in food flavorings, cosmetics, asthma inhalers, and artificial “smoke” at rock concerts. NOTE: Some people are allergic to PG (e.g., a rash or sore throat, but nothing serious). They should use…

• VG is Vegetable Glycerin (USP-grade) – more syrupy, and derived from veggies. PG generates somewhat more flavor and throat hit; VG produces a bit more vapor.