10 ms·They aren't "sort of are". Potato, rice, and bread all metabolize to sugar.by magic_beans 12y agoThey aren't "sort of are". Potato, rice, and bread all metabolize to sugar.seivan 12y agoThanks, you get it. The person completely missunderstood it.ars 12y agoThey all have protein too, which makes them "sort of are". However the carbs in potato especially metabolize very fast to sugar. The others are slower. But even potato has protein.