A vape that tastes full-on, feels smooth and throws proper clouds is not just about the flavour name on the bottle. The base matters. If you have ever asked, what is VG and PG in vape juice, they are the two liquids that carry flavourings and, where included, nicotine. Their ratio shapes nearly every part of the experience, from the first inhale to how quickly your coil gets tired.
For flavour-led vapers, getting this part right can be the difference between a rich, sweet profile that lands properly and a thin, harsh puff that does nothing for the blend.
What are VG and PG in vape juice?
VG means vegetable glycerine, sometimes written as glycerol. It is a thick, slightly sweet liquid commonly used in food, cosmetics and pharmaceutical products. In e-liquid, VG brings density, softer inhales and the big vapour clouds many people are after.
PG means propylene glycol. It is much thinner than VG and has very little taste of its own. PG is especially good at carrying flavour and creating a more noticeable throat hit, which is the slight catch at the back of the throat that can make a vape feel sharper or more cigarette-like.
Most bottled e-liquids use a blend of both rather than one alone. You will usually see a ratio such as 50/50, 60/40 or 70/30. The first number is normally VG, so a 70/30 liquid contains 70% VG and 30% PG. That small label tells you a lot about how the liquid is likely to perform.
VG: smoother clouds and a subtle sweetness
High-VG vape juice is thick, plush and built for vapour production. Vegetable glycerine has a naturally mild sweetness, which can round out dessert, candy, fruit and creamy flavour profiles. Think berry sweets with a fuller body, or a rich vanilla note that does not feel dry on the exhale.
Because it is smoother, VG can suit people who find a strong throat hit unpleasant. It is often the better match for direct-to-lung vaping, where vapour is drawn straight into the lungs using a higher-powered device and a lower-resistance coil.
There is a trade-off. Its thickness means high-VG liquid does not wick as quickly through small coil openings. A powerful sub-ohm tank or device designed for thicker liquid can handle it well. Put 70VG or 80VG liquid into a compact pod with tiny wick ports, though, and you may get dry hits, muted flavour or shortened coil life.
VG also creates more visible vapour. That is part of the appeal for cloud chasers, but it is worth considering if you prefer a more low-key vape when you are out and about. Big clouds can be less discreet, no matter how good the flavour is.
When high VG makes sense
A higher VG ratio is usually a solid call when you use a sub-ohm kit, enjoy airy direct-to-lung draws and want a softer, sweeter inhale. Ratios around 70/30 VG/PG are common for this style. Your device instructions should always be the final word, because coil design matters more than a one-size-fits-all rule.
PG: clearer flavour and more throat hit
PG is the lighter half of the mix. It flows quickly into a coil and helps flavour come through with definition. If you want the bright edge of citrus, the cooling lift of menthol or the distinct layers in a complex fruit blend, PG helps keep those notes clear rather than overly rounded.
It also gives more throat hit than VG. For some vapers, particularly those using nicotine-containing e-liquid, this is a key part of the satisfaction. A tighter mouth-to-lung draw with a 50/50 blend can feel closer to the sensation of smoking than a high-VG, wide-open cloud setup.
The downside is that higher-PG liquid can feel harsh for some people, especially at stronger nicotine levels or when taking long, hard draws. PG may also leave your mouth feeling dry, so keeping a drink nearby is sensible. A small number of people find PG irritating or are sensitive to it. If you experience ongoing throat discomfort, rash, wheezing or other unusual symptoms, stop using the liquid and speak to a healthcare professional.
When more PG is the better fit
A 50/50 vape juice is often the practical choice for refillable pod kits and starter devices. It is thin enough to wick reliably, delivers a balanced amount of flavour and vapour, and does not demand massive power. For many everyday vapers, it is the no-drama middle ground.
Choosing a VG/PG ratio for your device
The right ratio is not about which ingredient is objectively better. It depends on the kit in your hand and the type of vape you enjoy.
A small pod system or mouth-to-lung device generally works best with 50/50 liquid or another blend around that level. These devices use modest power and narrower airflow, so they need a thinner liquid that reaches the cotton consistently. Trying to force thick cloud-chasing liquid through them is a quick route to burnt-tasting puffs.
Sub-ohm tanks, larger vape mods and high-powered direct-to-lung devices are usually designed for thicker e-liquid. A 70VG/30PG blend is a familiar starting point because it balances generous vapour with enough PG to keep flavour lively. Some devices can handle even more VG, but always check the coil guidance before filling up.
If you are caught between the two, 60VG/40PG is a useful compromise. It provides a smoother inhale and more vapour than 50/50, while staying less demanding than a very thick 70VG liquid. It can work in some modern pods, but device compatibility still comes first.
How VG and PG affect flavour, coils and throat feel
The same flavour concentrate can taste noticeably different in two base ratios. More PG tends to make the profile feel brighter and more precise. More VG adds body and sweetness, often making a flavour feel creamier or heavier. Neither is wrong. A sharp tropical blend may shine with more PG, while a confectionery-style flavour can feel properly indulgent with more VG.
Coil performance is another real-world factor. High-VG liquid is thicker and can leave more residue, particularly when paired with sweetened flavours. That does not mean it will always ruin a coil faster, but it can if the device is not built for it. High-sugar-style flavour profiles and dark liquids can be demanding on any coil, regardless of ratio.
PG-heavy liquids wick easily, which helps smaller devices stay supplied. Yet if the throat hit feels too intense, moving to a higher-VG blend may improve comfort more effectively than simply changing flavour.
A quick word on cannabis vapes and e-liquid
VG and PG are terms most often used for nicotine e-liquid and flavoured vape juice. They are not automatically ingredients in cannabis vape cartridges, disposable cannabis vapes or concentrated extracts. Many cannabis vape oils use other formulations, such as cannabis-derived or botanical terpenes, and products can vary widely.
Do not assume that ordinary e-liquid is suitable for a cannabis cartridge, or that cannabis concentrate can be poured into a standard refillable vape tank. These products need the right viscosity, hardware and formulation to work safely as intended. Never add oils, homemade mixtures or unverified thinners to a vape device. If you are choosing a ready-to-use cannabis vape, stick to a clearly labelled product made for that exact device and check its ingredients before use.
For adult vapers, the simplest move is to match the liquid to the coil, then let your preferred draw decide the ratio. Want smooth, sweet clouds? Lean towards VG in a suitable device. Want crisp flavour and a firmer throat hit from a pod? A balanced 50/50 blend is often the one that lands.