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In the trans configuration, the hydrogen atoms sit on opposite sides subject area: nutrition of the double bond. TFAs are created by a phenomenon called geometric isomerism, during which one of the hydrogen atoms crosses to the opposite side of the carbon double bond. Geometric isomerism occurs naturally in ruminant animals, which is why TFAs can subject area: nutrition be found in small amounts in dairy and meat products. It also occurs during subject area: nutrition hydrogenation, an industrial process through which food processors create shortenings and other solid or partially solidified fats, such as stick margarines, by reacting hydrogen with liquid oils. Hydrogenation also attaches hydrogen atoms to points of unsaturation on the fatty acid molecule. Food processors can manage the end results of the process so not all hydrogenated vegetable oils are high in trans fat.
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