Spaghetti is just sugar. Terrible for a lot of people too.
Is there some particular kind of spaghetti that you're referring to? Sugar's not even on the list of ingredients for Safeway generic spaghetti:
Durum wheat semolina [enriched with iron (ferrous sulphate) and B vitamins (niacin, thiamin mononitrate, riboflavin, folic acid)]