Psyllium is a form of fibre made from the husks of the Plantago ovata plant’s seeds. It sometimes goes by the name ispaghula. Psyllium grows around the world but is most commonly found in India. The whole seed has been used in traditional Iranian medicine for hundreds of years. It's used as a dietary supplement and is usually found in the form of husk, granules, capsules or powder. However, it can also be obtained through fortified breakfast cereals and baked goods. Psyllium husk is the main active ingredient in Metamucil, a fiber supplement often used to reduce constipation. Because of its excellent water solubility, psyllium can absorb water and become a thick, viscous compound that resists digestion in the small intestine.
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