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Vegetable Glycerin

VGIn regards to health, whether you are vaping a VG or PG based device does not matter. However, there are some differences that could matter from a user comfort perspective.

Like PG (Propylen Glycol), Vegetable Gycerin (VG) has been classified as “generally recognized as safe”. And like PG, this product has numerous applications in the personal care field including oral care products. It has also found use as a sugar substitute, which might explain why some vapers taste an increased sweetness in comparison to PG.

Chemically speaking, glycerin is an alcohol, but for food purposes, in the USA it is classed as a carbohydrate by the Federal Food and Drug Administration, because it provides calories and is not a fat or a protein.

Vegetable Gycerin or Glycerol is a simple polyol (sugar alcohol) compound. It is a colorless, odorless, viscous liquid that is widely used in pharmaceutical formulations.  Glycerol is sweet-tasting and of low toxicity.
 

Food industry

In foods and beverages, glycerol serves as a humectant, solvent, and sweetener, and may help preserve foods. It is also used as filler in commercially prepared low-fat foods (e.g., cookies), and as a thickening agent in liqueurs.

As a sugar substitute, it has approximately 27 kilocalories per teaspoon (sugar has 20) and is 60% as sweet as sucrose.
 

Pharmaceutical and cosmetics industry

There are also medical uses for vegetable glycerin. It is a common ingredient in cough mixtures, due to its soothing properties. Other applications are as a topical remedy for a number of skin problems, including psoriasis, rashes, burns, bedsores and cuts; as a laxative, in the form of suppositories; and to treat gum disease, as it inactivates the associated bacterial colonies.

In the cosmetics industry glycerol is used in many moisturizing skin products, as it seems to help relieve dry skin problems by drawing water up from the lower layers due to its hygroscopic properties.  It is also a component of glycerin soap, which is often used by people with sensitive skin. Lotions containing this compound are also popular.

Some individuals who have shown sensitivity to PG (such as sore throat) have found that VG does not have the same effect.

While VG is also known to produce more vapor, oddly enough vapers have reported that it produces less of a “throat hit” . On a practical note, the greater thickness of VG fluid can cause a reduction in the lifespan of the atomizer (though the reduction does not seem that dramatic).

So, in summary, though some users might find they prefer one over the other, both propylene glycol and vegetable glycerin can be considered safe components in any e-cigarette product.