Influence of non-starch polysaccharides on the in vitro digestibility and viscosity of starch suspensions

► We compared the effects of four types of NSP on starch digestibility in mixed system. ► Evaluation of relation between starch digestibility, glucose diffusion and viscosity. ► Xanthan gum was proved to have the pronounced suppressing effect on digestibility. ► The impact of NSP on the viscosity of starch suspensions depended on the shear rate. ► Effect of NSP was not only due to higher viscosity and retarding diffusion.