What is considered a primary source of dietary fiber?

Fruits and vegetables are considered a primary source of dietary fiber due to their high content of both soluble and insoluble fiber. Soluble fiber, found in foods such as apples, citrus fruits, and oats, can help lower cholesterol levels and control blood sugar, while insoluble fiber, found in items like carrots, celery, and whole vegetables, aids in digestion and promotes regular bowel movements. The presence of these fibers in fruits and vegetables is crucial for maintaining digestive health, as well as providing various vitamins, minerals, and antioxidants essential for overall well-being.

In contrast, foods like white bread, soft drinks, and ice cream are typically low in dietary fiber. White bread is often made from refined flour, which lacks the bran and germ that contain fiber. Soft drinks do not contain any fiber at all since they are primarily composed of sugar and water, and ice cream, while it may contain some lactose from dairy, is primarily a source of fat and sugar with minimal fiber content. This distinguishes fruits and vegetables as standout sources of fiber in the diet.