Vegetable glycerin, a simple poll compound derived from corn or other common vegetables. It is a colorless, odorless, viscous liquid that is widely used in pharmaceutical formulations.
Glycerol has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature.
Becoming more common in E-Juice and becoming even more popular. Newer brands use 80-92$ VG. VG produces more vapor than any other ingredient found in E-Juice.