Abstract: A composition and method of treating symptoms of diarrhea that utilize administering an effective amount of an isolated calcium aluminosilicate anti-diarrheal (“CASAD”), wherein the isolated CASAD is substantially free from T4-dioxin and toxic heavy metal contamination, waiting a period of time; and repeating the administration of the composition until the symptoms of diarrhea are mitigated. The symptoms of diarrhea may be associated with chronic or infectious diseases, inflammatory proteins, treatment using drugs, or treatment using a chemotheraputic agent in a subject in need of treatment. The isolated CASAD is capable of binding inflammatory proteins, drug metabolites, and chemotherapeutic agents. The isolated CASAD can be administered in any suitable form, such as in tablet, powder, or suspension form, and can be administered by any suitable route, such as orally.