If the label looks like this:
Carb 8
. Sugar 0
. Sorbitol 7
then the sorbitol is already included in the Carb count. Sao you count it as 8 carbs. Which is a LOT if you are only on 20 gm per day. How about 2 cups of lettuce with oil instead?

Sorbitol is a sugar alcohol which is not considered to raise insulin levels, but sugar alcohols may stall many people.