Actually, both are correct. The total carbs is 20 grams, but the amount of sugar alcohol is 18 grams. Sugar alcohol is hypothetically a non-impact carb, so can be subtracted out of the total giving you a total of 2 net carbs. For most people, sugar alcohols are not a problem, for others it slows or stalls their weight loss. You will have to be the judge of whether it is OK for you. Personally, sugar alcohol does not have any impact on my weight loss.