Psyllium is a natural, water-soluble fiber obtained from the husks of seeds of an Asian plant. Chemically, it is rich in arabinoxylans, a class of non-starch dietary fibers with a high water-binding capacity. Psyllium is only partially fermentable and forms a viscous gel in the presence of water, which is key to many of its functional properties.
Traditionally used for digestive support, psyllium is known for its bulking effect and water-holding capacity, which help maintain regularity and stool consistency. Its gel-forming nature also contributes to cholesterol and blood sugar management.
A word on terminology
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Other types of prebiotic fibers
Inulin
Inulin is a soluble dietary fiber naturally found in various fruits and vegetables, particularly abundant in chicory root. It acts as a prebiotic, selectively nourishing beneficial gut bacteria and supporting overall health.
Galacto-oligosaccharide
Galacto-oligosaccharide (GOS) is a prebiotic fiber produced from lactose. It is commonly used in infant formula, dairy products and supplements to support health.
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References
Geremew Kassa, M., Alemu Teferi, D., Asemu, A. M., Belachew, M. T., Satheesh, N., Abera, B. D., & Erku, E. G. (2024). Review on psyllium husk: nutritional, functional, health benefits, food industry applications, waste treatment, and potential negative effects. CyTA – Journal of Food, 22(1). https://doi.org/10.1080/19476337.2024.2409174