What Does Oat Fiber Contain? Understanding the Composition
                                
                                
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                                    4 min read                                
                            
                                Did you know that commercial oat fiber is an extract derived from the discarded outer husks of the oat grain, making it distinct from whole oats? This fine, flavorless powder, used to add bulk in low-carb baking, contains virtually no calories or digestible carbohydrates.