Psyllium is a natural fiber derived from the seeds of the Plantago ovata plant. It is commonly used as a dietary supplement to improve digestive health. Psyllium absorbs water in the intestines, forming a gel-like substance that helps to soften stool and promote regular bowel movements. In addition to aiding digestion, psyllium can help lower cholesterol levels and manage blood sugar levels. It is often found in over-the-counter laxatives and fiber supplements, making it a popular choice for those looking to increase their fiber intake and support overall health.