The present invention relates to a method for modifying materials that have low soluble fiber content and high insoluble fiber content so as to enhance bile acid binding capacity by increasing the level of available soluble fiber that can be obtained from such starting materials in order to create ingredients that are useable in food intermediates that are suitable for lowering unhealthy cholesterol levels. More particularly, the present invention relates to controlling the moisture content, mechanical pretreatment and alkali treatment of such starting materials as wheat bran or shorts.