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 VG & PG In Vape Juices: What You Need To Know Quel est le meilleur ratio PG VG pour votre e liquide ? Do you know the differences between PG and VG vape juice? Propylene Glycol vs. Vegetable Glycerin: A guide for vapers and vaping PG Free Vape Juice Collection Velvet Cloud