Is Fiber High in Calories? The Surprising Nutritional Truth
                                
                                
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                                    3 min read                                
                            
                                According to the FDA, fermentable fibers provide only about 2 calories per gram, far less than regular digestible carbohydrates. This fact provides a clear answer to the common question: is fiber high in calories? The scientific truth reveals that fiber is a unique carbohydrate that contributes very little energy to your diet.