The present invention relates to synergistic compositions which include mixtures of fermentable fibers. These compositions include inulin and arabinoxylan for use in reducing, preventing and/or treating inflammation. The arabinoxylan is partially hydrolyzed arabinoxylan and the ratio of inulin to arabinoxylan and/or partially hydrolyzed arabinoxylan is between 65%/35% by weight and 90%/10% by weight.