The husks of psyllium seeds are rich in soluble fiber. When exposed to water, they swell up to ten times their original size and form a gelatinous mass, a quality that makes them one of the most widely used bulk-forming laxatives.

A common ingredient in over-the-counter laxatives, psyllium seed husk power is among the safest and most gentle sources of dietary fiber. Not only does it relieve constipation and help maintain a healthy digestive tract, it also lowers cholesterol levels.

Psyllium seed husk powder is odorless and almost tasteless. As a dietary supplement, it must be taken with water to prevent obstruction. The powder is also widely used in the food industry as a thickening agent.