Plantago-seed mucilage is often referred to as husk, or psyllium husk. It is a wheat bran cereal that is a source of high fiber and psyllium. Some evidence suggests soluble fiber supplementation (e.g., psyllium/ispagula husk) is effective. However, agents such as psyllium seed husks increase the bulk of the feces. Bulking fibers can be soluble (e.g. psyllium) or insoluble (e.g. cellulose and hemicellulose). The mucilage obtained from psyllium comes from the seed coat. A bulk forming agent (e.g. psyllium) or stool softener can also reduce constipation. Psyllium is produced mainly for its mucilage content. The soluble fiber in psyllium is the polysaccharide heteroxylan, a hemicellulose. It is also one of the leading producers of Isabgul (Psyllium husk) in the country. It is a common source of psyllium, a type of dietary fiber. Psyllium supplements are typically used in powder form, along with adequate amounts of fluids. Doses as low as 10g cause significantly more intestinal gas and flatulence than even psyllium. For instance, psyllium provides bulking as well as viscosity. There are a number of psyllium products used for constipation.