What's dietary fiber? Dietary fiber is often a form of carbohydrate, but It's not digested and absorbed by the human body like starch or sugar, so it doesn't have any calories. What is dietary fiber? Dietary fiber is actually a variety of carbohydrate, but It's not necessarily digested and absorbed https://www.onehealth.sg/2022/04/05/how-probiotics-affect-your-digestion/