An elemental diet is one that contains easily absorbable proteins in the form of amino acids, very minimal fat content, and easily absorbable vitamins and mineral content. Elemental diets have been used to maintain nutrition and reduce diarrhea (because absorption in the upper intestine can reduce stool volume) in patients with inflammatory bowel diseases. Use of an elemental diet formula has been studied in patients with cancer for its effect on radiation-induced diarrhea.