Elaidic acid the major trans fat found in hydrogenated vegetable oils. Its IUPAC name is trans-9-octadecenoic acid, and its lipid shorthand name is 18:1 trans-9. It is the trans isomer of oleic acid. A trans fatty acid (commonly shortened to trans fat) is an unsaturated fatty acid molecule that contains a trans double bond between carbon atoms, which makes the molecule less kinked compared to cis fat. Research suggests a correlation between diets high in trans fats and diseases like atherosclerosis and coronary... Hydrogenation is a chemical reaction in which unsaturated bonds between carbon atoms are reduced by attachment of a hydrogen atom to each carbon. ... The International Union of Pure and Applied Chemistry (IUPAC) is an international non-governmental organization devoted to the advancement of chemistry. ... In chemistry, geometric isomerism is a form of stereoisomerism and describes the orientation of functional groups at the ends of a bond around which no rotation is possible. ... Oleic acid is a monounsaturated fatty acid found in various animal and vegetable sources. ...