Psyllium seed husks
 Psyllium seed husks also known as ispaghula isabgol or psyllium are portions of the seeds of the plant Plantago ovata (genus Plantago) a native of India and Pakistan. They are hygroscopic which allows them to expand and become mucilaginous. Psyllium seed husk are indigestible and are a source of soluble dietary fiber. They are used to relieve constipation irritable bowel syndrome and diarrhea.