e liquids are primarily comprised of Propylene Glycol or PG, Vegetable Glycerin or VG, and Concentrated Flavours. Nicotine is optional. These ingredients are universal and make up at least 98 % of the content of e liquids. Additional ingredients may be alcohol, additives and or various compounds.
Putting aside nicotine for a moment, the majority of these ingredients are FDA approved and GRAS - Generally regarded as safe. Although this pertains to general consumption and not inhalation, research suggests that the the inhalation of Propylene Glycol or PG, Vegetable Glycerin or VG, Nicotine and Concentrated Flavours, are taken into account to derive at the 95 % safer percentage.
Nicotine, whilst still a subject of much debate and ridicule, is now viewed as being about as harmful as caffeine. However, it is fair and just to say that it could possibly offer far more positives than negatives. See our post on The Truth about Nicotine.
Apart from nicotine, as mentioned above, there can be additional ingredients used in the production of commercial e liquids. These can include stabilisers, plasticizers, sweeteners, enhancers, saline and alcohols, such as 1,2,4-Butanetriol.
But what about those Diketones?
One of the most talked about ingredient types of late are Diketones, of which Diacetyl is the most well known. This group of compounds provide that yummy buttery taste we often find in dessert and bakery juices. Here is a post I've done on these custard notes.
With all eyes on the vaping industry, It is highly unlikely that we will see reputable e juice companies flogging bottles of hazardous chemicals. As a side note, nor will they be targeting or coaxing children with candy flavoured offerings like gummy bears. Adults like these too.
Off to mix up some yummy juice....
From The Table,
It's all about the juice...