My understanding is that maltodextrin is a very high glycemic sugar alcohol. For me, it really affects my blood sugar levels (more so than table sugar). I think the Sugar Busters shopping guide, which I no longer have, says you can have sugar alcohols as long as a serving contains no more than 10 g. That's a physical nightmare for the body, in my opinion, but ...
In Sugar Bust for Life! With the Brennan's (which was not written by the original authors, but one of the authors, Ellen C. Brennan, is listed as having worked on the original project in some editorial sense ... anyhow, the book and its sequel, functions as a cookbook and correct general overview of Sugar Busters), it's listed as under "Hidden Sugars and Other Unacceptable Ingredients." (Sorry for the long sentence up there!

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Maltodextrin, unfortunately, is one of those really bad for you things (IMO) that is being added to EVERYTHING that is otherwise labeled healthy (including processed items for the South Beach Diet, Phase II, which is similar to Sugar Busters) and for all I know the Sugar Busters line of products as well (which I've looked at online but never seen in a store). They sometimes put maltodextrin (as well as actual sucrose) in the little packages of crystallized artificial sweeteners (such as Splenda, Equal, etc.), so you have to look at the label of these if you desire not to eat these ingredients.
They often put maltodextrin in "sugar free" ice cream.
I believe the general consensus of the authors is that these items in small amounts are not a concern, but I disagree with that, especially when it comest to maltodextrin ... why take a chance?