GSK. Plant based fiber. Nourishes good bacteria. Clear & taste free. 62 powder servings. Benefiber is a plant based prebiotic fiber. What is Prebiotic Fiber? Prebiotic fiber strengthens and nourishes the good bacteria in your gut to support an environment for good digestive health. What's good for your gut is good for you. Benefiber dissolves completely in your beverages and foods - water, coffee, yogurt, whatever you desire (Not recommended for carbonated beverages). Packaged by weight, not volume. Contents may settle during shipping and handling.