Grains are a crucial part of the human diet. They come in many types like rice, wheat, corn, oats, and barley, and are a good source of carbohydrates, fiber, vitamins, and minerals. Grains can be used in many dishes like snacks, cereals, pasta, and bread. Nonetheless, some grains may contain gluten, which can cause problems to those with gluten intolerance or celiac disease. For best health benefits, it is recommended to consume various whole grains in the diet like brown rice, quinoa, whole wheat, and oatmeal.