PG and VG in E-Liquids: What Is the Difference?

Anyone taking a closer look at e-cigarettes for the first time will inevitably encounter abbreviations that seem cryptic at first glance. The base of almost every liquid consists of two main ingredients. But what exactly do PG and VG mean in liquids? In short: they determine how the vapor feels, how intense the flavor tastes, and how large the vapor clouds get. Understanding the PG-VG difference allows you to optimally adapt the vaping experience to your own needs and the hardware used.

What Do the Abbreviations PG and VG Mean?

The basic composition of e-liquids is strictly regulated by law and consists primarily of base liquids, flavorings, and optionally nicotine. The base liquid is made up of propylene glycol and vegetable glycerin.

Propylene Glycol (PG)

PG stands for propylene glycol. It is a clear, almost odorless and tasteless liquid. It has been used in the food and cosmetic industries for decades. When vaping, PG fulfills two crucial functions:

• Flavor carrier: PG binds flavors exceptionally well. The higher the PG content, the clearer and more intensely the flavor is delivered.
• Throat hit: PG is largely responsible for the slight scratch in the throat, known as the throat hit. This effect is particularly appreciated by those switching from smoking, as it mimics the feel of a traditional cigarette.
• Viscosity: PG is very thin. This ensures that the liquid flows quickly and saturates the coil effectively.

Vegetable Glycerin (VG)

VG stands for vegetable glycerin. In contrast to PG, glycerin is significantly thicker and naturally possesses a slight sweetness. This substance is also widely used in foods and personal care products. When vaping, VG is characterized by the following properties:

• Vapor production: VG is the engine for dense, voluminous vapor clouds.
• Smooth sensation: A high VG content makes the vapor smoother and reduces the throat hit.
• Viscosity: Since VG is very viscous, it requires larger liquid intake holes on the coil to prevent burning (dry hits).

The Difference Between PG and VG at a Glance

To easily distinguish between propylene glycol and vegetable glycerin in practice, it helps to look at their direct contrasts:

Property	Propylene Glycol (PG)	Vegetable Glycerin (VG)
Consistency / Viscosity	Very thin	Thick (syrupy)
Vapor Production	Lower	Very high and dense
Flavor Delivery	Excellent	Weaker (requires more flavor)
Throat Hit	Clearly noticeable	Very smooth

Which E-Liquid Mixing Ratio Is the Best?

The question of which e-liquid mixing ratio is the best cannot be answered with a simple rule. The choice of the ideal liquid mixture depends heavily on the device used and personal preferences.

50/50 Ratio (For MTL Devices)

A PG-VG ratio of 50/50 is the absolute standard for smaller e-cigarettes and pod systems. These devices are designed for so-called MTL (Mouth to Lung) vaping. They feature a tight draw resistance and operate at low power. Because the liquid intake holes on these coils are small, the 50 percent PG content ensures a smooth flow of liquid. At the same time, this blend offers a perfect balance of good flavor, sufficient vapor, and a moderate throat hit.

70/30 or 80/20 VG/PG (For DL Devices)

Those who use powerful sub-ohm devices usually draw the vapor directly into their lungs (DL - Direct to Lung). Here, large amounts of vapor are the priority. Therefore, a liquid with a high VG content (mostly 70% VG and 30% PG) is used for these devices. The high VG content creates massive clouds and prevents the throat hit from becoming too harsh with such a large volume of vapor. The larger coils in sub-ohm tanks have no problem handling the higher viscosity of the liquid.

In Practice: More Vapor or More Flavor in E-Liquids?

Many consumers ask themselves: Should the e-liquid deliver more vapor or more flavor? If flavor is the priority and a noticeable throat hit is desired, the PG content should not fall below 50 percent. On the other hand, those who value dense clouds should opt for VG-heavy blends.

This is particularly relevant when mixing liquids yourself. For example, if you use a longfill like the Antimatter Black Hole, the bottle only contains the highly concentrated flavor, which is mostly dissolved in 100% PG. If you fill this bottle up with a pure VG base, you end up with a very vapor-heavy liquid. If you top it off with a 50/50 base, the final ratio shifts slightly in favor of PG, which intensifies the flavor.

Conclusion

Understanding the ingredients is essential for an optimal vaping experience. While PG acts as a flavor carrier and provides the familiar throat hit, VG is responsible for dense vapor and smooth inhalation. Anyone using a small pod system will fare best with a 50/50 mix. Fans of massive clouds and open sub-ohm tanks should reach for VG-heavy liquids. If you noticed any other unfamiliar terms while reading, feel free to check out our Vape Glossary. If you are still looking for the right device for your preferred liquid ratio, our Vape Brand Directory offers a helpful overview.

Frequently Asked Questions

What do the abbreviations PG and VG mean?

PG stands for propylene glycol and VG for vegetable glycerin. Both substances form the base liquid of an e-liquid, ensuring that the flavor is bound and vapor is produced when heated.

Which PG/VG ratio is suitable for which vape device?

For small pod systems and MTL (Mouth to Lung) devices, a ratio of 50% PG and 50% VG is ideal, as the liquid is thin enough for the small coils. For powerful sub-ohm devices (DL - Direct to Lung), liquids with 70% VG or more are recommended, as these produce large vapor clouds and are smoother on the throat.

How does the mixing ratio affect vapor production and flavor?

A higher PG content provides a more intense flavor and a stronger throat hit, but produces less vapor. A higher VG content, on the other hand, creates dense, voluminous vapor clouds and a smoother sensation when inhaling, though it slightly mutes the flavor intensity.

Can I mix VG and PG myself?

Yes. Pure PG and VG bases as well as pre-mixed bases (e.g., 50/50 or 70/30) are available on the market. Those using longfills or concentrates can control the final mixing ratio themselves by choosing the added base liquid.