What is a common source of dietary fiber?

Whole grains are a common source of dietary fiber because they contain all parts of the grain, including the bran, germ, and endosperm. The bran, in particular, is rich in fiber, which aids in digestion and helps maintain a healthy gut. Fiber is essential for adding bulk to the diet, promoting regular bowel movements, and can assist in managing blood sugar levels and cholesterol. Whole grains can include foods like brown rice, quinoa, oats, and whole wheat products, all of which provide significant amounts of dietary fiber compared to refined grains, which usually lack the bran and germ, leading to a decrease in fiber content.

In contrast, white rice and butter contain minimal to no fiber, while sugar offers no fiber at all. Therefore, whole grains are recognized as a beneficial source of dietary fiber in a balanced diet.