Glycerin is in the Polyols category, this category includes Sugar alcohols, like sorbitol, Malitol, erythritol, etc. It is like a sugar alcohol, but not a sugar alcohol. Glycerin does taste sweet and does have calories, but interestingly enough only has the sweetness of about 60-70% of white table sugar. Glycerin is used in foods, but not that often. Glycerin is used in cosmetics most because it attracts and maintains moisture. This is why it is used mixed with wax as a suppository as it attracts water into the colon and thus creates the need to go.
While Glycerin does have calories and sometimes more so than white table sugar it does not cause a rise in blood sugar - but it can create a laxative effect depending on amount of consumption, for some it is low and others high.
Did the FDA say that Glycerin is a sugar alcohol? It is not by definition, of course the FDA puts out stuff that is just wrong many times.
Glycerin is required to be declared on the label and since it does create a laxative effect with excess consumption it does need to be declared that way on the label - but, guess what I had a product with Glycerin in it and it did not contain that warning.
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