Erythritol

Erythritol is one of the polyols and is made from fermented grape sugar, has almost zero calories, a glycemic index of zero and is gentle on the teeth.

Unlike other sugar alcohols, erythritol has a very low calorie content and doesn't significantly affect blood sugar levels. 

It provides 70% of the sweetness of sugar without the laxative effects. It is a popular choice for people with diabetes or following low-carb diets, and it doesn't contribute to tooth decay.