Psyllium(Plantago ovata and P. Major)
Psyllium is a major source of fiber. The primary use of psyllium seed and/or psyllium seed husks is as a bulk laxative, especially for cases of chronic constipation. The tiny seeds contain a coating of gelatinous material, which swells upon contact with moisture. This increases the movement (motility) within the colon thus producing a bowel movement. Psyllium husk is an approved over-the-counter laxative.