Some artificial sugar-free sweeteners like:
Aspartame, Saccharin, Sucralose
might best be digested as protein rather than carb to be effective for the body, maybe useful for making sinews, hair, skin and nails, rather than nerves and brain. Derived from cell shell it is the protein part of the nutrient it originates from.
Maltitol and Xylitol
appear to be of lipid origin, and should be metabolized as fat.
