Inulin is a soluble fibre from the chicory root. It is found in several roots of plants, but only the inulin from the chicory root is used to produce Mastic Horse Treatment. Inulin is a prebiotic, the 'food' of beneficial bacteria. It not only helps the beneficial bacteria develop, but also helps the digestive system work more efficiently. This, in turn, improves the balance of intestinal flora, the vital factor of a healthy digestive system. In summary, therefore, inulin supports normal gut function.