Abstract: A nutritional supplement that includes a natural soluble fiber and a natural insoluble fiber is disclosed. The nutritional supplement includes an amount of a natural soluble fiber from 30% to 70% by weight, and an amount of a natural insoluble fiber from 30% to 70% by weight. The natural soluble fiber that is used is inulin, and the insoluble fiber that is used is cellulose. Xanthan gum is added in a negligible amount and serves as a stabilizer and to improve shelf life by helping to resist enzymatic degradation. A method of preparing a nutritional supplement is also disclosed. The insoluble fiber and the soluble fiber are blended to form a substantially homogenous, quickly dispersing powder blend. The powder blend can then be formed into a capsule, tablet, or wafer, or alternatively can be used as a food or drink additive.