The present invention includes a dispersible dietary fiber composition comprising a colloidal silicon dioxide and a substantially uncoated, fibrous, vegetable material powder that is not naturally dispersible in water, which preferably includes psyllium. Other components, such as a saccharide polymer compound (preferably maltodextrin), a preservative, and a flavorant may also be included. The present invention further includes a method for producing a readily dispersible dry dietary fiber composition by dry blending colloidal silicon dioxide and a substantially uncoated, fibrous, vegetable material powder.