What is a function of dietary fiber?

Dietary fiber plays a crucial role in the digestive system and is essential for maintaining gut health. It helps to promote regular bowel movements by adding bulk to the stool, which facilitates its passage through the intestines. This action can prevent constipation and contribute to a lower risk of developing gastrointestinal disorders such as diverticulitis.

Moreover, certain types of dietary fiber, particularly soluble fiber, can aid in regulating blood sugar levels by slowing down the absorption of sugar, thereby improving overall glucose control. Additionally, fibers can contribute to a feeling of fullness, which can help with weight management. The presence of fiber in the diet is also linked with beneficial effects on gut microbiota, promoting the growth of healthy bacteria that are crucial for overall digestive health.

In contrast, the other options mention functions that do not align with the primary roles of dietary fiber. Essential vitamins are typically found in fruits, vegetables, and grains but are not provided by fiber. Fiber itself does not serve as an energy source, as it is not digested and absorbed like other macronutrients. Finally, dietary fiber can actually help to lower cholesterol levels rather than increase them, particularly soluble fiber found in oats and legumes, which can bind to cholesterol in the digestive system and help excrete it from the