what's sugar alcohol?

hey guys, i know what glycerol is, but what is sugar alchol? is it considered a carb?

It is technically carb-based…sugar alcohols are a family of structures which can not be broken down by the body completey…they include sorbitol, manitol and others
Sorbitol has a caloric value of 2.76kcal

They do cause gastric distress let me tell you