As a result of the Isomalto-oligosaccharides (IMO) lawsuit, QUEST Nutrition eventually replaced IMO with Soluble Corn Fiber (SCF), another synthetic fiber that changed the taste and texture of Quest Bars significantly–to the dismay of many loyal customers. While there’s not much scientific research available on Soluble Corn Fiber yet, anecdotal evidence based on blood glucose testing suggests that it’s almost entirely indigestible (this is a good thing) and has a low glycemic index. Hence, you need only add back in about 10% of the list of carbohydrates on keto protein bars that are fortified with SCF. You’re still better off with natural fibers like inulin.