Okara powder contains 58.6% dietary fiber, which almost is insoluble dietary fiber. Okara dietary fiber mainly consists of arabinose, galactose, xylose and galacturonic acid, and its molecular weight is from 724 kDa to 2081 kDa. Noodle, bread and steamed bread containing 25%, 10% or 15% okara powder, respectively, exhibited lower glycemic indexes (GI