Glycerine (also known as Glycerol) is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic.
It is widely used in the food industry as a sweetener and may help preserve foods. It is also used as a filler in commercially prepared low-fat foods 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. It is added to cake icing to prevent it from setting too hard.