18 carbs, and 6 of those are from sugar, the rest are from sugar alcohols which are not absorbed by the stomach, so they don't spike your blood sugar as bad. I am not diabetic but I followed south beach for about 2 years until I had to stop it due to a major Vitamin c deficiency. I got really used to paying attention to carbs.
My husband is borderline type 2 diabetic, and our roomate is type 1 diabetic. He has no issues with the frozen yogurt with no added sugar