NuNaturals Oat Fiber is the perfect ingredient for low-carb baking. NuNaturals Oat Fiber contains zero calories per serving because it is almost entirely insoluble fiber. Getting enough fiber into your daily diet is difficult, but not anymore! You can add NuNaturals Oat Fiber to your favorite recipes, smoothies, or sprinkle on foods or drinks for a fiber boost.NuNaturals Oat Fiber is an easy way to increase the fiber in your diet. Oats are one of the best natural sources of fiber available. All Natural Process: Oat Fiber is naturally produced from food-grade oat hulls through a proprietary, chemical-free process