Origin
Mannitol belongs to the sugar alcohols and its name is derived from the manna ash tree, which contains up to 12% of this substance. For use in industrial production, however, E 421 is obtained through hydrogenation of fructose. Colorless, sweet-tasting crystals are formed that dissolve well in water.
Usage
There is no maximum quantity limit for the use of E 421. E 421 is mainly used in foods suitable for diabetics as it is metabolized by the body without insulin production. Mannitol, however, has only about three-quarters of the sweetness of regular sugar. The substance can be found in sugar-free desserts and sweets as well as chewing gum. Furthermore, in dietary supplements, mustard, and sauces.
Risks
The consumption of mannitol is completely risk-free. E 421 is considered safe. However, E 421 has a laxative effect when consumed in large quantities. Therefore, warning labels are placed on food packaging if the contents contain more than 10% sugar substitutes.