The PG (Propylene glycol) and VG (Vegetable Glycerin) are the two primary base ingredients of eliquid. They are all FDA approved and are equally safe. The PG is a clear, colorless liquid PG and VG are two common base ingredients in e liquids for electronic cigarettes, playing crucial roles in various vaping products. Let's explain their meanings using simple and understandable Ge Gou E Liquid Considerations: VG vs PG Galaxy Vapes Inc. LNW Blog PG vs VG Which PG VG Ratio is Best?