Which function is NOT associated with fiber?

The function that is not associated with fiber is the provision of energy. Fiber is a type of carbohydrate that the body cannot digest, which means it does not provide calories or energy in the same way that digestible carbohydrates, proteins, or fats do. Instead, fiber plays crucial roles in digestive health, including helping to regulate blood sugar levels, promoting regular bowel movements, and assisting in maintaining a healthy weight by contributing to feelings of fullness and aiding in overall dietary regulation.

The other options highlight important functions of fiber. For instance, fiber helps regulate blood sugar by slowing the absorption of sugar, which can prevent spikes in blood glucose levels. It also promotes regular bowel movements by adding bulk to stool, which facilitates easier passage through the digestive tract. Additionally, fiber can help maintain a healthy weight by promoting satiety and reducing overall calorie intake, as high-fiber foods often require more chewing and digesting, leading to a prolonged feeling of fullness.