PG stands for propylene glycol, while VG stands for vegetable glycerin. Both are compounds that are added to e-liquid or e-juice to enhance its attributes. The ratio of PG and VG will vary in different e-liquids depending on the flavor, and both can be used to amplify certain characteristics of the vaping experience.
Propylene Glycol is more commonly used than Vegetable Glycerin in the production of e-liquid and has a thinner consistency. Additionally, it’s generally thought to offer a greater flavor intensity than Vegetable Glycerin. As it has a thinner consistency, Propylene Glycol will not clog your clearomizer as much as Vegetable Glycerin.
Vegetable Glycerin is thicker than Propylene Glycol, and because of this it can be more difficult to prevent clogging in the e-cigarette when using a VG-based e-liquid. Vegetable Glycerin is also sweeter than Propylene Glycol, meaning it can affect the flavor of the e-liquid. Vegetable Glycerin also provides a thicker vapor density, meaning the plumes of vape produced when using a VG-based e-liquid are more voluminous than those produced using a PG-based e-liquid.