The liquid used in e-cigarette pens has three main components. These are all:
solvent
Sweetener
And seasonings
The purpose of this solvent is to dissolve substances such as nicotine compounds (such as THC or CBD) so that smokers can inhale them.
The most common solvents in electronic cigarette pens are propylene glycol and glycerol. Glycerol helps to generate vapor clouds. Propylene glycol is a colorless syrup like liquid.
The sweeteners used in electronic cigarette liquids typically contain ethyl maltol and sucralose. The administrative agency believes that all these ingredients are relatively safe to consume. However, there is some controversy regarding the use of electronic cigarette pens.