I have made pasta salad with the elbows twice. I am a Type 2 diabetic so I can see how it affects me by the blood sugar number I get after eating it. It seems that if you make it into a salad and eat it the same day it still blocks the carbs, but the longer it sits in the fridge the more the carb blockers wear off. It didn't make me high the first day but it did when I tried to eat it again after it had been in the fridge a couple of days. I have not tried reheating it but I would think it would have the same effect. So I would agree with whoever said it probably wears off more the longer it's around after having been cooked.