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Propylene Glycol  (PG) vs Vegetable Glycerin (VG)

Propylene Glycol  (PG) vs Vegetable Glycerin (VG)

Propylene Glycol (PG) and Vegetable Glycerin (VG) are odourless liquids that combined with flavour and nicotine to create e-juice. Both PG and VG belongs to alcohol class but they are not intoxicating, which deemed as a sugar alcohol and are included in many consumable products.

When heated, this substance produces vapour which allows them to be inhaled. PG and VG are not categorised as oils, therefore it cannot cause any of the medical issues - like lipoid pneumonia – that inhaling actual oil can. They also have distinct mouth and throat sensation when vaped. Each of the fluids has a different consistency and a slightly different taste.

Though the ratio can vary dramatically, most modern e-liquids use a combination of both fluids. This makes some vaping set-ups can work only with a certain level of PG and VG. You might want to choose carefully for the right level for your equipment as choosing the wrong PG/VG ratio can put first-timers off.


Propylene Glycol (PG)

Propylene Glycol (PG)

So what is exactly is PG? PG stands for propylene Glycol which a petroleum by-product. The fluid is odourless, colourless and is less viscous than VG. It is used to provide ‘throat hit’ in vaping, which give the same sensation experienced when smoking tobacco. It also carries flavour more effectively than VG, making it the most commonly used suspension fluid for flavour concentrates and nicotine.

Without knowing, the substance can be found in various common household items like:

  • Nicotine inhalers.
  • Toothpaste and other oral hygiene products.
  • Medical products used orally injected or as topical formulations.
  • Pet food (excluding cat food).
  • Beauty products, including make-up, shampoo and baby wipes.


Vegetable Glycerin (VG)

Vegetable Glycerin (VG)

While PG is a petroleum by-product, VG is a natural chemical obtain from vegetable oils. So it is safe for vegetarians. It is usually used in e-liquid to produce a ‘thick’ sensation to vapour. VG is considerable thicker and has a slightly sweet taste than PG. VG is more suitable for sub-ohm vaping as it provides a much smoother throat hit than PG. Some vendors are offering a VG alternative, to enable 100% VG mixes while nicotine and flavourings are commonly suspended in PG.

Like PG, VG also can be found on various household items like:

  • Sweetener as a sugar replacement.
  • Beauty products, such as make-up, mousse, bubble bath, aftershave, and deodorant.
  • Pet food.
  • Soap and hand cream.
  • Food such as baked goods, to increase moisture.
  • To provide thick gel for certain medicinal creams, capsule pills and jellies.
  • Toothpaste and other dental care products.

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