@meggsy. i was just trying to make the very simple point that my limited researches suggested there are different sorts of maltodextrins and suggesting it would be sensible to bear that in mind when discussing the shakes with maltodextrin on the ingredients list. They might lead to an increase in blood glucose, they might not, it depends on exactly what maltodextrins were used.
It was more a comment about the rules and regulations surrounding labelling than it was about anything else. They are good as guidelines but you need to be a bit wary when trying to use them to evaluate blood glucose changes.
One might expect that the maltodextrins used in shakes designed to assist blood glucose control might be of the sort that are not digested to produce glucose. One would have to dig a little deeper than examining the ingredients list find out.
PS... I make my own soups and am the sort who would not contemplate consuming artificial foods like shakes of this sort. They may be right for some, but not for me.