Fiber contributes to lowering the postprandial rise in blood glucose because it delays the absorption of carbohydrates from the meal that has been eaten.
Fiber is made up of various polysaccharides called non-starch (non-glycemic) polysaccharides that are not digested by human digestive enzymes.
Therefore, we can conclude that fiber decreases the absorption of food substances such as cholesterol and delays the absorption of glucose, lowering the glycemic index of foods.
Learn more about fiber and the control blood sugar levels here: https://brainly.com/question/4287218