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 Cloudy Vape Co. All Collections Do you know the differences between PG and VG vape juice? Nicotine Nicokits & Boosters for Vaping Vaposelection E liquid Ratios Explained: The Ultimate Beginner's Guide Bold Tobacco Monster E Juice Vapor Authority