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What is e-juice made out of?

Vaping Post 19/09/2017

What is e-juice made out of?

That’s a question that many people seem to be confused about. From well-meaning vapers who say “It’s just water vapour” (it isn’t) to tobacco control fanatics yelling, “We don’t know what’s in it” (we do), misinformation and weird beliefs about E-Liquid are all over the place.

Luckily, there’s no real mystery about how e-juice is made or what goes into it. In fact the ingredients are usually all listed on the label. That’s the law in the EU and soon will be in the USA, but reputable juice makers have been doing it for years anyway.

So it’s easy to find out what’s in your e-juice, but is that really very informative? Most of it is chemical names, which can look intimidating – and they also don’t say a lot about what the substances actually are. That makes it easy for people to create scare stories, such as “E-Liquid contains antifreeze” (it doesn’t!)

Most E-Liquid has four main ingredients; there’s some variation, but not really very much. If you know the basics you’ll be able to spot any differences quickly. In the meantime, here’s what you can expect to be pouring into your atomiser.

Vegetable glycerine

Liquid designed for modern atomisers is mostly vegetable glycerine, or VG – this can be up to 80% by volume. If you want to know how it is that E-Cigs have gone from producing a little wisp of thin vapour to belching out huge white plumes, this is why.

Glycerine is a natural substance that can be processed from most kinds of fat. The glycerine used in e-liquid comes from vegetable oils, which is why it’s called VG, but it doesn’t really make a lot of difference. One important point is that although it’s processed from oils it isn’t an oil. In fact it’s an alcohol, which makes it safe to inhale.

VG is a non-toxic colourless liquid with no smell, but a sweet taste. It’s very thick and viscous, which means high-VG liquids don’t work well in older atomisers and small clearomizers – it’s too thick to wick well. Some liquids use aqueous glycerine to solve this, basically just VG with some water added.

Lots of common products contain VG. It’s used in the food industry as a sweetener, and also added to some foods to keep them moist. Many medicines contain it too. Scientists have studied it for years, and it’s never been linked to any health problems.

Liquids with a lot of VG produce lots of dense vapour, but not a lot of throat hit.

Propylene glycol

Most of what isn’t VG in your liquid is probably propylene glycol, or PG. Some liquids contain more PG than VG; these work better in clearomizers and older atomisers, because they’re less viscous.

PG is an alcohol, like VG, and it’s also nearly odourless. It has a faint sweet taste, although not enough for it to be used as a sweetener; it does get added to foods, medicines and other products to keep them moist, though.

One other use for PG is in antifreeze, and it’s because of this that some people like to claim e-juice contains antifreeze. In fact this is totally dishonest. PG is only one ingredient in antifreeze, and it’s actually there because it’s non-toxic; PG-based antifreeze is less harmful to children and pets. It’s worth pointing out that water is also an ingredient in antifreeze; just because something is used in a product that has a reputation for being poisonous, that doesn’t say anything about how harmful that substance is.

It’s true that there have been some minor health issues linked to PG. It’s been studied since the 1940s and is classed as generally safe; swallowing or inhaling it won’t do you any harm. A small percentage of people are sensitive to it, though, so if liquid with a high PG content makes you feel unwell, switch to one with more VG.

PG produces less visible vapour than VG, so it’s unpopular with cloud chasers but liked by people who want to vape discreetly. It also carries flavours better and gives more throat hit.

Flavourings

One of the best things about vaping is the wide choice of delicious-tasting juices, and that’s all down to flavourings. Liquid doesn’t have much taste on its own, so it’s flavoured with food-grade additives.

If there are any health concerns about vaping that’s mostly down to flavourings. There are some ingredients that are safe to eat but not to inhale – diacetyl, for example. However, the industry has done well at eliminating additives that there are worries about. Don’t use food flavourings from the supermarket though; some of them contain oils, which are harmful if inhaled. Stick to flavours from vape manufacturers, because these have been elected for maximum inhalation safety.

Nicotine

Finally, most liquids contain nicotine. This is what makes vaping such an effective substitute for smoking; you can satisfy your nicotine cravings without having to set fire to tobacco leaves. Nicotine also gives a good throat hit, so if this is important to you try higher-nicotine liquids.

Although it gets a lot of bad publicity, nicotine is actually a very safe drug: It’s the smoke from cigarettes that causes harm, not the nicotine. It is toxic in high does, but there’s really no chance of poisoning yourself by vaping. Long before you get to a dangerous level it will make you feel slightly nauseous, then give you a headache. Vapers (and smokers) are very good at getting just as much nicotine as they need, and no more.

It’s usually best to avoid E-Liquids that contain anything apart from these four ingredients. Vitamins, colouring, supplements like caffeine – these don’t do anything for the quality of your vape, and unlike flavourings they haven’t been selected for inhalation safety. But if you stick to the ingredients listed here you can look forward to a low-risk and enjoyable vaping experience.

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