Hi Jason!

What that means is that Dr. Atkins feels that out of those 21 grams of carb only 2 have an impact on your blood sugar. The problem with that is that for some people, sugar alcohols DO have an impact on their blood sugar or certainly their weight loss. The sweet taste can also provoke cravings in a lot of people. My advice would be to avoid the Advantage bars for sure during induction and then after that, keep them to an occasional treat or something that you have on hand for emergencies where there is nothing else legal to eat. Many people also report that they don't like the taste anyway.
I've done some reading on Dr. Atkins site and there he does admit that these bars do tend to stall some people and he also recommends that for those who can have them without stalling their weight loss that they be limited to no more than 1 per day.