The primary nutritional component of grains is carbohydrates. Grains serve as a major energy source in many diets worldwide, providing the fuel needed for daily activities. Along with carbohydrates, grains also offer varying levels of protein, fiber, vitamins (such as B vitamins), and minerals (like iron and magnesium). Whole grains, in particular, retain their bran and germ and are more nutrient-dense compared to refined grains. Including grains in the diet can contribute to overall health by aiding digestion and reducing the risk of chronic diseases like heart disease and diabetes.