Erythritol is a naturally occurring sugar alcohol, produced commercially by microbial fermentation of a carbohydrate substrate.
It's used as a sugar substitute because it has a very low caloric value. It's known for having a sweet taste, but it's not as intense as sugar. It has a minimal impact on blood sugar levels.
Erythritol is used in many sugar-free products, including ice cream, candy, gum, cookies, cakes, protein bars, and fruit spreads. It is also used in cosmetics as a humectant.