A member of the Brassica family, Brussels sprouts look like cute little cabbages. Brussels sprouts are named after the city of Brussels in Belgium from where they are thought to originate. Brussels sprouts are a very good source of vitamin C, B group vitamins and fiber. They also contain some potassium. Like all members of the Brassica family, Brussels Sprouts contain compounds which are thought to inhibit the development of some cancers.