Metamucil

Psyllium /slim/, or ispaghula /spul/, is the common name used for several members of the plant genus Plantago whose seeds are used commercially for the production of mucilage. Psyllium is mainly used as a dietary fiber to relieve symptoms of both constipation and mild diarrhea, and occasionally as a food thickener.[1] Allergy to psyllium is common in workers frequently exposed to the substance. Use of psyllium in the diet for three weeks or longer often lowers blood cholestero... [wikipedia]