the high-proportion of oxidation-prone polyunsaturated fatty acid is undesirable for some uses, such as cooking oils. three companies, monsanto company, dupont/bunge, and asoyia in 2004 introduced low linolenic roundup ready soybeans. hydrogenation may be used to reduce the unsaturation in linolenic acid. the resulting oil is called hydrogenated soybean oil. if the hydrogenation is only partially complete, the oil may contain small amounts of trans fat.