Every e-liquid is built on PG, VG or a blend of the two, and the base changes how the juice tastes, how it hits and how your device behaves. Plenty of people buy e-juice without knowing which one they are getting, then wonder why two bottles feel so different. Here is what each base does. Survey data on e-cigarette use by age shows how many adults have tried vaping at least once, so the question comes up a lot.
The two bases
PG stands for propylene glycol. It is a thin, runny liquid with no taste of its own.
VG stands for vegetable glycerin. It is thicker, comes from vegetable oil extracts, and tastes slightly sweet by itself.
Side by side
| Trait | PG | VG |
|---|---|---|
| Flavor | Stronger, since the base is tasteless | Mellower and sweeter |
| Throat hit | Firm kick | Softer |
| Vapor | Less | A lot |
| Thickness | Thin, wicks fast | Thick, wicks slowly |
| Residue | Less gunk and gurgling | More gunk and gurgling |
Why you might choose PG
Because propylene glycol adds no taste, the flavoring mixed into it comes through more intensely. It also delivers a strong kick at the back of the throat, which some vapers compare to the feel of a cigarette.
Its thinness helps the hardware too. The wick soaks it up quickly, so less residue collects inside the device and you hear less gurgling. That adds up to less time spent on upkeep.
Where PG falls short
Many people are allergic to propylene glycol. Find out whether you are before you use a PG-based liquid, because vaping it with an allergy puts your health at serious risk.
PG also burns off faster than VG. If you are not paying attention, that can leave you with a burnt coil, and replacement coils are not cheap. Someone who does not look after their vaporizer may end up spending more as a result.
Why you might choose VG
Glycerin’s own sweetness rounds off the flavor, so a VG liquid tastes softer and sweeter than the same flavor in PG. It suits a more relaxed session and works well with certain fruit profiles. Our guide to picking flavors that suit you goes further on that.
The main draw, though, is vapor. VG produces a great deal of it, which is why people who practise cloud tricks lean toward it.
Where VG falls short
Being viscous, VG takes longer to soak into the wick, and some people find the wait a nuisance. The thickness can also cause heavy residue build-up, which means a device that gurgles more often.
Making the call
Choose PG if sharp flavor, a firm throat hit and low maintenance matter most to you, provided you are not allergic to it. Choose VG if you want big clouds and a sweeter, smoother taste and do not mind slower wicking and extra cleaning.