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E-liquids, also known as vape juices, are the liquids used in electronic cigarettes to produce vapour. Most e-liquids are made up of four main ingredients. These are propylene glycol (PG), vegetable glycerin (VG), flavourings, and optional nicotine.
Common ingredients in vape liquids
Propylene Glycol / Vegetable Glycerin

Propylene glycol (PG) is a clear and odorless liquid. Food and pharmaceutical products frequently contain propylene glycol. PG creates a thinner and less dense vapor than VG which makes it easier to inhale. Very rarely, some people report throat irritation from PG, so they tend to choose e-liquids that have higher VG ratios.
Vegetable glycerin (VG) is a thick and sweet-tasting liquid. You will find vegetable glycerin used in many food and pharmaceutical products. When manufacturers make e-liquids, they use VG to create a thicker and denser vapor than PG. Some people opt for e-liquids that contain high VG concentrations due to personal preference, or because they feel sensitive to PG. Some people also choose e-liquids with higher VG ratios because they can produce bigger clouds and a smoother vaping experience. VG tends to make vapour feel softer in the mouth, but can also tend to make fruit flavours taste a little “dull”.
PG and VG are common ingredients in vape liquids. Most e-liquids contain a mixture of both PG and VG. E-liquids have varying ratios of PG/VG depending on the desired flavour, throat hit, and vapour production. By combining different ratios of PG and VG, manufacturers can create e-liquids with different characteristics to cater to a wide range of vapers’ preferences.
Flavourings in e-liquids
The flavourings added to e-liquids are what give them their unique taste and aroma. These flavourings can be made from natural or synthetic sources and come in a wide range of flavours. They range from fruity and sweet to menthol and tobacco.
Many e-liquid manufacturers take great care in selecting high-quality flavourings. It’s essential to choose e-liquids from reputable manufacturers who use only approved food-grade flavourings to ensure a safe and enjoyable vaping experience. The best manufacturers always make sure qualified experts also check that all flavourings are safe to inhale in the long term.

Nicotine in e-liquids
Nicotine is an optional ingredient in e-liquids, and its concentration can vary between different products. It is one of the more addictive substances in traditional tobacco products. Many vapers use e-liquids containing nicotine as a way to wean themselves off traditional cigarettes.
It’s important to note that nicotine in any form can be addictive. However, many vapers find that using e-liquids with lower nicotine concentrations or gradually decreasing their nicotine intake can help them reduce their dependence on nicotine over time.

Nicotine Salts
Another ingredient that has gained popularity in recent years is nicotine salts. Nicotine salts are a type of nicotine that create a smoother vaping experience. Some people find them more similar to smoking traditional cigarettes.
Your body can absorb nicotine salts more quickly than traditional nicotine. This can lead to a more intense and satisfying vaping experience with less harshness on the throat. Some smokers find it easier to switch to vaping using nicotine salts.
Are the ingredients in vape liquids safe?
In general, the ingredients in vape liquids are safe to use as long as they are used properly. Choosing reputable brands that use high-quality and safe ingredients is important. By learning about e-liquid ingredients, vapers can make informed decisions about the products they use and enjoy a safer and more pleasant vaping experience.