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Everything you need to know about PG and VG e-liquids

Everything you need to know about PG and VG e-liquids


Whether you are an experienced smoker who switches to fumes, or a starter who has never had a cigarette in hand; it takes some getting used to the wonderful world of e-liquids. In addition to the many flavors and the amount of nicotine, you also have to take into account the thickness of the liquid. The main ingredients of e-liquid are PG (Polypropylene Glycol) and VG (Vegetable Glycerin), two different substances, each with their own unique characteristics. On this page we explain exactly what the influence of PG and VG is on e-liquids.


Note: We explain the difference between PG and VG e-liquids on this page, it is not intended as sales advice for products related to electric cigarettes.


Composition of e-liquid

By default, an e-liquid is composed of these four ingredients:


  • Polypropylene Glycol (PG)
  • Vegetable Glycerin (VG)
  • Distilled water (is not always necessary)
  • Aroma


Nicotine can be a fifth ingredient but this is optional. The basis is intended to retain the aroma and possibly also nicotine in a suspension, which creates a vapor that the user inhales. A suspension is a liquid that contains particles that are not soluble.


What are PG and VG used for?

Both Polypropylene Glycol and Vegetable Glycerin are both substances that have been used for decades in various products. For example, since the 1950s, PG has been used in injectors for people with COPD and Asthma. This basis ensures that the medication can be inhaled. This makes it a neutral substance that is used to inhale other substances. This can be medicines, but also substances that occur in e-liquid. PG has a boiling temperature that is 188 degrees Celsius, in low doses this product is suitable for consumption. In addition to food such as soft drinks and ketchup, we also find this substance in shampoo, soap and toothpaste. VG is also a substance that is used for injectors. It is a thicker liquid that evaporates from 290 degrees Celsius. It is a substance that is found in the body, and is found in blood, among other things. Vegetable Glycerin also has a significant share in wine.


Polypropylene Glycol PG e-liquid

PG is the most common substance in e-liquids. It is a substance that has a lower viscosity, making it a thinner liquid that can be easily absorbed by the coil into a clearomizer. There is less chance of clogging in the e-cigarette when using PG in the liquid. Polypropylene Glycol is an odorless and tasteless substance that does not influence the taste of the aroma in the e-liquid. Because PG can cause a dry mouth and throat, it is recommended to drink water while steaming.


Risk of allergy with PG

There is a limited percentage of vaporizers that is allergic to Polypropylene Glycol. The symptoms are a stinging sensation in the throat and a rash. If you suffer from these symptoms it is better to switch to an e-liquid with a higher proportion of Vegetable Glycerin. Consider a share higher than 70 percent. Although many people with an allergy to PG are already familiar with this because of the presence in many other products, it is important to mention this. The reactions are usually not dangerous, but can be annoying for the user.


Vegetable Glycerine VG e-liquid

In comparison with PG, VG is a considerably thicker liquid. Because the taste of Vegetable Glycerin is somewhat sweeter, you can also taste it at higher concentrations in the e-liquid. When using VG in the liquid, more aroma is also needed to taste the taste of the e-liquid. This means that e-liquids based on more PG generally have a somewhat stronger taste. With PG there is more chance of a dry mouth, with VG a more slimy feeling can occur in the mouth. This experience differs per person, not everyone reacts the same to these substances. VG ensures a higher production of vapor and a less irritating feeling in the throat. This feeling is usually referred to as a "throat hit".


Throat hit plays an important role in vapors, and is caused by the combination of PG and nicotine. The higher the proportion of these substances, the stronger the feeling in the throat.


Use of PG and VG

There is no "best" e-liquid that gives the most optimal experience for everyone. By experimenting with different products you can determine for yourself which liquid best suits your preferences. Here are the characteristics of both substances:


  • Polypropylene glycol
  • Lower viscosity
  • Stronger throat hit
  • Lower vapor production
  • Possible skin rash
  • More taste


  • Vegetable glycerin
  • Higher viscosity
  • Little or no throat hit
  • Higher vapor production
  • More slime
  • Less taste


Can you mix PG and VG?
Many e-liquids that are commercially available fit