What is the primary benefit of using whole grains instead of refined grains?

The primary benefit of using whole grains instead of refined grains is that whole grains retain their bran and germ, which are the parts of the grain that contain the majority of their fiber and nutrients. When grains are refined, the bran and germ are removed, resulting in a loss of essential vitamins, minerals, and dietary fiber. This means that whole grains provide greater health benefits, including better digestive health and a lower risk of chronic diseases such as heart disease and diabetes. Additionally, the fiber in whole grains contributes to feeling full longer, which can aid in weight management. Therefore, choosing whole grains over refined grains is a key recommendation for a nutritious diet.