Lactitol

Sugar-free sweetener: Candy, chocolates, baked goods, ice cream, other sugar-free foods.
Lactitol is a sugar alcohol. It is made from lactose (milk sugar). Like most other sugar alcohols, lactitol is not absorbed well by the body (which means it has only about half the calories of sugar), and it does not promote tooth decay. However, large amounts (above 20 to 30 grams) may cause loose stools or diarrhea.