Yerba Prima Great Plains Bentonite provides strong detoxification in the digestive tract, with the ability to bind with unwanted substances by adsorbent action. Great Plains Bentonite is specially formulated to provide the maximum benefits of bentonite. Bentonites mechanism of action is physical, due to its colloidal structure and charged particles of sodium, calcium, magnesium and potassium ions, which allow it to bind with unwanted substances in the stomach, small intestine and colon. It is not digested, nor is it absorbed into the bloodstream. Since unwanted substances are bound to the bentonite, they are excreted from the body when the bentonite is eliminated through bowel movements.