The main nutrient found in grains is carbohydrates, primarily in the form of starch. Grains like wheat, rice, oats, and corn are staple foods in many diets around the world and serve as a primary source of energy. In addition to carbohydrates, grains provide dietary fiber, essential vitamins, and minerals such as B vitamins, iron, and magnesium. Whole grains, in particular, are rich in fiber, which is beneficial for digestive health. Incorporating grains into a balanced diet can promote overall health and help maintain energy levels.