Kirkland Signature Optifiber is an easy way to add fiber to your diet. Many Americans are not getting an adequate amount of this important nutrient from their diets alone. Optifiber quickly dissolves in hot or cold beverages and is flavor-free, sugar free and non-thickening so you can easily add it to your favorite foods without even noticing! Our fiber is even grit-free so you can easily stir it into foods like yogurt and oatmeal to boost the fiber content without changing the taste. Each serving provides a good source of fiber to support a healthy digestive system. Natural Prebiotic Good Source of Fiber Supports a healthy digestive system Sugar-free, flavor-free, grit-free Add to your favorite foods and drinks without even noticing!