VG (Vegetable Glycerin) is one of the two most common and main ingredients of e-liquid. VG is a colorless, viscous (thick) organic compound that acts as a diluent or filler. Found in countless food, cosmetics and pharmaceutical products - glycerin has a light, sweet taste, low toxicity and is thicker than propylene glycol. It is used at higher ratios in e-juices when thicker, richer vapor production is desired or where a PG sensitivity of the user is present. Global Vapery uses only USP grade (United States Pharmacopoeia) vegetable based glycerin, so you can be assured that your VG will be crafted on a foundation of quality components.