I think it depends... I'm losing and eating 2 of em a day...

Basically from what I hear they CAN destabilize your blood sugar level-- because even though theres only 2 net carbs-- the rest of those "hidden non-effective carbs" are sugar alcohol--- now sugar alcohol doesn't really have an impact on your insulin levels and it will burn first-- keep that in mind- it will burn first-- before your body burns anything else for energy i.e. fat, protein... it's going to burn the sugar alcohols that you eat-- but if you're getting really active-- you can still eat these bars as a quick meal on the go-- I find that I can eat one and not even think about food for hours--- they're amazing, I buy them on e-bay now! (Much much cheaper on ebay)