Interesting research, even if it isn't something you'd immediately assume would go into commercial products. The fact that they see a weight decrease simply from adding calorie free weight to the food is interesting to me. I knew different foods can have vastly satiety at the same calorie count, but I would not assume that this could be simply due to a weight or volume difference. I would more have assumed that our bodies response to breaking down the foods would regulate our hunger to aim for a given amount of energy intake.