Psyllium husk powder is a type of soluble fiber that is derived from the seeds of the Plantago ovata plant. It is commonly used as a dietary supplement and is also found in many foods, including breakfast cereals and baked goods.
In protein powders, psyllium husk powder may be added as an ingredient to help increase the fiber content of the product. It works by absorbing water and swelling up in the digestive tract, which can help to promote feelings of fullness, regulate bowel movements, and improve overall digestive health.
Psyllium husk powder is generally considered safe when used in recommended amounts.