Oat products - whether cereal or oatmeal - are often studied for health benefits, particularly related to cholesterol due to its soluble fiber content. Oat bran cereal has antioxidant content similar, but slight less than, oatmeal which is less processed.
ORAC Source
USDA Database for the Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2 - Prepared by Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (BHNRC), Agricultural Research Service (ARS), U.S. Department of Agriculture (USDA) - May 2010