What is VG in e-liquid and what does it do?

 　　1、What is VG?

 　　Answer: VG, also known as "Vegetable Glycerin" or "Propylene Glycol" (Vegetable Glycerin), is a colorless, sweet-tasting, clear, viscous liquid that is odorless and has a warm sweet flavor. The national standard refers to it as glycerin, which can absorb moisture from the air and can be used as a solvent, lubricant, pharmaceutical agent, and sweetener. It is a basic material widely used in food, cosmetics, and pharmaceuticals.

 　　2、What is the role of VG in e-liquid?
 　　Answer: Because VG produces a large amount of vapor when heated, its main role is to generate smoke. At the same time, PG has a certain level of irritation, so VG also helps to balance the flavor in the e-liquid, making the vapor smoother on the inhale.
 　　3、What are the characteristics of VG?
 　　Answer: VG is very viscous, has poor fluidity, and has high hygroscopicity. When heated, it produces a large amount of vapor, and it has a sweet taste. It is widely used in various fields of daily life, such as food, cosmetics, cakes, chocolates, and many pharmaceutical products contain VG.
 　　4、Does VG cause adverse reactions?
 　　Answer: So far, no adverse reactions of VG on the human body have been found. However, due to VG's high hygroscopicity and viscosity, it may cause users to feel dry mouth and may lead to poor oil supply in some less efficient atomizers. VG itself has poor solubility, making it difficult for many components to dissolve in VG, so it is usually combined with PG to dissolve flavors and nicotine before adding.