Inulin CasNo.: 9005-80-5 is a type of fermentable fiber that is found naturally in the roots of many foods, such as whole wheat, onions, garlic, and artichokes, and is commonly extracted from chicory root and added to foods. Dietary fibers can promote gut health, increase feelings of fullness, aid in weight loss, and improve heart health by reducing cholesterol. Inulin is a type of oligosaccharide called a fructan. Fructans are a chain of fructose (sugar) molecules strung together. Inulin is fermented by bacteria that normalize the colon and is considered a prebiotic. Prebiotics may improve gastrointestinal health as well as potentially enhance calcium absorption.