VG vs PG What are They and the Key Differences Between the Two? E liquid Ratios Explained: The Ultimate Beginner's Guide PG VG Mix Make My Vape PG VG Ratio, What Does it Actually Mean? Red Vape PG vs. VG: What's the Difference? 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