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Feedstock sources Although biodiesel can be produced from any triglyceride, the popular fats and oils most commonly used worldwide are: The predominant feedstock used in the United States is soybean oil. Other vegetable oils, such as corn, cottonseed, canola (rape seed), flax, sunflower and peanut, also can be used. These seed oils generally are more expensive than soybean oil.
However, on several days in October 2003, the cash price of soybean oil did exceed that of corn oil. Animal-derived
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