Optimizing Dietary Fiber Blends

Response surface methodology (RSM) was used to determine the effect of the three independent variables, that is, the addition amount of chaff dietary fiber(A), the addition amount of soybean hull dietary fiber (B), and the addition amount of inulin (C).
Seventeen treatments were conducted based on the Box-Behnken design (BBD). Each run was done in triplicate. The designed response surface tests are presented in Table 1.
According to the preliminary experiment based on RSM, the optimum condition of the three dietary fibers was determined and was used in the following experiments, which was 1.40% chaff dietary fiber, 1.42% soybean hull dietary fiber, and 3.24% inulin, respectively.