Oats are high in fiber and contain more protein and fat than most other grains, so they help you feel fuller longer. They also contain antioxidants and a very special type of fiber called Beta-Glucan. Beta Glucans are found in cereals (like oats and barley) and certain types of mushrooms. They have been shown to help lower insulin resistance and blood cholesterol, reduce the risk of obesity, boost the immune system and decrease susceptibility to infection and cancer.