Chicory roots are used to extract the storage polysaccharide inulin on an industrial scale. Next to inulin which is used as a dietary fiber and a prebiotic agent, the remaining root pulp contains cell wall polysaccharides which can be potential fiber supplements to food.
This study investigates the in vitro fermentability of soluble and insoluble fibers in chicory root pulp (CRP) in the human proximal colon. The fibers consist of 62 % pectin, 11% hemicellulose and 27% cellulose. While CRP mostly contains insoluble fibers, processing of the pulp released four times more soluble pectin than CRP. When fermented in a model which mimics the human proximal colon, the processed pulp was fermented to a lesser extent than the unprocessed pulp. These findings are discussed in the thesis.