Psyllium is a fiber that comes from a plant called Plantago ovata (blonde psyllium). The plant has tiny, gel-coated seeds. Psyllium is found in the seeds’ husk. Psyllium is soluble, meaning that it can dissolve in water. When preparing psyllium for commercial use, the seeds are first harvested and cleaned. In some formulations, the husks are separated from the seeds and processed; in others, the husk remains intact. Black psyllium ( P. afra), another variety of the seed, is also available.

Psyllium can be found as a dry seed or husk. It is a common ingredient in many popular laxatives and is available in powder, capsule, tablet, and wafer form.1,15