The function of dietary fiber in the diet includes aiding in digestion, regulating blood sugar levels, and promoting a feeling of fullness, which can assist in weight management. Fiber is categorized into two types: soluble and insoluble. Soluble fiber helps lower cholesterol and stabilize blood sugar, while insoluble fiber adds bulk to stool, facilitating regular bowl movements. A diet rich in fiber can also reduce the risk of developing chronic conditions, such as heart disease and diabetes, making it a crucial component of a healthy diet.