Those noodles are pure cellulose (fiber) and are noted for complete lack of taste. I think I remember reading somewhere that they are a form of cellulose gel.

There are a number of "no calorie" foods made with a cellulose gel base, specifically from Walden Foods. They have a chocolate syrup that isn't bad, not great, but OK. Some grocery/health food places carry a good supply of their offerings, including a BBQ sauce.

I have heard nothing about the dehydration/rehydration of these cellulose gel based products.

They would probably be good for diabetics, or at least less harmful than the sugared conventional versions.