What is the role of fiber in a healthy diet from whole grains?

The role of fiber in a healthy diet, particularly from whole grains, is essential for aiding in digestion. Fiber adds bulk to the digestive system, which helps to keep food moving through the intestines and promotes regular bowel movements. This not only prevents constipation but also contributes to overall gut health.

Additionally, the consumption of fiber is associated with a feeling of fullness, which can help manage appetite and contribute to maintaining a healthy weight. While fiber has other benefits, such as helping to reduce cholesterol levels and potentially lowering the risk of certain diseases, its primary and most direct role concerning digestive health is to facilitate the digestive process.

The other options do not align with the primary function of fiber in whole grains. For instance, fiber does not provide protein, it does not increase sodium intake, and although fiber can contribute to lowering cholesterol, that is not its essence in the context of digestion. The focus on digestion emphasizes the importance of fiber in maintaining a healthy and functional digestive system.