[jeetoid]

I wonder how much glycerol they use, the article is scant on data.

You'll often see somewhere around 10g of glycerol in a protein bar, bodybuilders take quite a bit too in order to increase water in muscles and it's safe [0].

Glycerin is also used for baking, used for stuff like fondant.

[0]: https://pmc.ncbi.nlm.nih.gov/articles/PMC3590833/