Provided herein is a method for treating untreated rice bran to produce a treated rice bran. The method comprises inactivating lipase in the untreated rice bran, saponifying the fatty acids in the untreated rice bran to fatty acid salts, and contacting the untreated rice bran with a source of bisulfite anions so that an aldehyde or ketone in the untreated rice bran forms an organosulfite. The method produces the treated rice bran, wherein the amount and characterization of protein and fiber between the treated rice bran and the untreated rice bran remain unchanged. A treated rice bran composition is also provided, which comprises fatty acid salts, inactivated lipase, organosulfites, between about 14% and about 16% by weight protein, and between about 8% and about 10% by weight fiber.
