Psyllium husk is primarily used for its high fiber content and its ability to absorb water and form a gel-like substance. It is commonly used as a dietary supplement to promote regular bowel movements and relieve constipation. Psyllium husk is often added to foods, beverages, or baked goods to increase their fiber content. It can be used as an ingredient in smoothies, shakes, breakfast cereals, granola bars, and gluten-free baking recipes. It is also used as a binder and texturizer in certain food products.