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Glycerin Glycerin is a trihydric alcohol that is derived from animal fats and plants emollients. It is used in many protein bars to give the bar a soft texture and to make it easy to chew. Glycerin yields 4.32 calories per gram. Glycerin is a crystalline, viscous liquid formed when fat molecules split. It is half as sweet as sugar and is used to keep bars moist and to plasticize other foods such as fudge, gum, geltin, etc. The big question is if glycerin is a carb or is it a new 'category'. The reason that glycerin is not listed as a carbohydrate by some manufacturers is that glycerin does not effect blood glucose or insulin levels. However, the FDA states that glycerin is to be listed as a carbohydrate; thus the controversy. Back to Glossary of Fitness Index.

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