Production of edible products from crude soybean oil requires some combination of refining steps, but first the oil must be extracted from the soybean. The oil must be refined to remove off flavors and impurities that cause smoke when heated. The oil is then filtered in a process referred to as “bleaching," and finally is deodorized to remove volatile compounds using super-heated steam under a vacuum. The oil from this process is referred to as refined, bleached and deodorized, or RBD.