<P> In the 2002--2003 growing season, 30.6 million tons of soybean oil were produced worldwide, constituting about half of worldwide edible vegetable oil production, and thirty percent of all fats and oils produced, including animal fats and oils derived from tropical plants . </P> <P> Per 100 g, soybean oil has 16 g of saturated fat, 23 g of monounsaturated fat, and 58 g of polyunsaturated fat . The major unsaturated fatty acids in soybean oil triglycerides are the polyunsaturates alpha - linolenic acid (C - 18: 3), 7 - 10%, and linoleic acid (C - 18: 2), 51%; and the monounsaturate oleic acid (C - 18: 1), 23% . It also contains the saturated fatty acids stearic acid (C - 18: 0), 4%, and palmitic acid (C - 16: 0), 10% . </P> <P> The high - proportion of oxidation - prone linolenic 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 . </P> <P> The carcinogen N ‐ Nitrosodi - n - butylamine has been measured in soybean oil at a concentration of 290 μg / kg, in cheese at 20 to 30 μg / kg, and in smoked or cured meats at up to 3.9 μg / kg . It has also been detected in tobacco smoke at a concentration of 3 ng per cigarette . </P>

Where does partially hydrogenated soybean oil come from
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