Vegetable oil is obtained by extracting the oil from seeds commonly processed for edible use. Corn and soybean oil provide the main sources of vegetable oil available for livestock. Both corn (55 percent) and soybean (53 percent) oil contain high amounts of the essential fatty acid linoleic acid. These oils, primarily used to add energy to the diet, provide a high amount of unsaturated fatty acids. Vegetable oil supplies slightly more energy than animal fats and may be used to reduce dustiness in feeds. Another vegetable oil, flax oil, is starting to receive more interest because of its high alpha-linolenic acid content (ALA, 18:3, w-3). ALA, is a polyunsaturated omega-3 fatty acid.