There seems to be some doubt floating around out there about whether or not Vegetable Glycerine is a danger to a persons health when inhaled, as it is with E-cigarettes. Many articles have been written, and many studies conducted about the way PG, or propylene glycol, affects the body, in answer to many criticisms and misleading statements be anti-tobacco activists. Because of this, Vegetable Glycerine has been left by the proverbial wayside. However, there have been enough studies done on VG to determine one undeniable fact; Vegetable Glycerine is one of the most harmless organic liquids that ever comes in contact with a human body on a regular basis. In fact, its already used in so many ingestible products that I cant possibly list them all here, but to provide a brief example, VG is used as an artificial sweetener in many, many foods, its used in packaged foods that need to retain moisture while packaged, and its used in almost every dental product on the market, from toothpaste to denture paste.
Once VG, or glycerol enters into the body, either orally, transdermally (through the skin) or via inhalation of vaporized glycerol, it is metabolised in an extremely efficient, simple, and common manner. Once broken down, glycerol is converted (mostly) into carbon dioxide (which we exhale) and water. A very small amount is transformed into essential sugars that are also regularly used by the body.
It has been found that Vegetable Glycerine is hypo-allergenic, which is especially important to vapers who happen to be allergic to propylene glycol which is, of course, the other major ingredient in E-liquids. Studies have also shown that glycerol has very low numbers in other tests concerning the skin, eyes, and upper respiratory system. It does not cause mutation of cells and/or chromosomal/dna information, and therefore it is considered to be harmless to the reproductive system. In fact all of these studies... (Click here to read the rest of my article.)