Oat bran is the outer layer of the oat grain that is typically removed during the milling process. It is a rich source of dietary fiber, particularly soluble fiber known as beta-glucan, which has been shown to help reduce cholesterol levels and improve heart health. Oat bran also contains essential nutrients such as protein, vitamins, and minerals, including B vitamins, iron, and magnesium. It has a slightly nutty flavor and can be used in a variety of culinary applications, such as adding to smoothies, baking into bread and muffins, or sprinkling over cereals and yogurt. Its high fiber content makes it a popular choice for those looking to improve digestive health and maintain a healthy weight.