Abstract: Compositions comprising glycerides containing conjugated linoleic acid moieties. These glycerides are prepared by an enzymatic conversion process which is selective to provide specific isomers, advantageously the cis9, trans11 and trans10, cis12 linoleic acid isomers or vice versa. The compositions may be blended with complementary fats and may be used in foods, food supplements and pharmaceutical compositions.

Abstract: Organic materials, comprising a mixture of at least two products (I) and (II), both containing isomers of conjugated long chain polyunsaturated fatty acids moieties (L1) and (L2) can be obtained by subjecting an organic material, selected from free fatty acids, mono-, di- or triglycerides, phospholipids, alkylesters or wax-esters, containing at least 5 wt. % of these conjugated polyunsaturated fatty acids, to an enzymic conversion (acidolysis, alcoholysis, esterification, hydrolysis) using an enzyme that can be discriminated between (L1) and (L2), so that original ratio L1/L2=XA in starting material is increased to XB, wherein XB≧1.1 XA.

Abstract: Organic materials, comprising a mixture of at least two products (I) and (II), both containing isomers of conjugated long chain polyunsaturated fatty acid moieties L1 and L2 can be obtained by subjecting an organic material, selected from free fatty acids, mono-, di- or tri-glycerides, phospholipids, alkyl esters or wax-esters containing at least 5 weight % of these conjugated polyunsaturated fatty acids, to an enzymatic conversion using an enzyme that can discriminate between L1 and L2, so that the original weight ratio of L1/L2=XA in the starting material is increased to XB wherein XB≧than 1.1 XA.

Abstract: Organic materials, comprising a mixture of at least two products (I) and (II), both containing isomers of conjugated long chain polyunsaturated fatty acids moieties (L I) and (I 2) can be obtained by subjecting an organic material, selected from free fatty acids, mono di or triglycerides, phospholipids, alkylesters or waxesters, containing at least 5 wt. % of these conjugated polyunsaturated fatty acids, to an enzymic conversion (acidolysis, alcoholysis, esterification, hydrolysis) using an enzyme that can be discriminated between (L 1) and (L 2), so that original ratio L 1/L 2≠X A in starting material is increased to X B, whrein X B≧1.1 X A.

Abstract: Novel fat-continous emulsion, containing a blend with emulsifying properties is obtained by the blending of: 0-90% of a partial glyceride (=A); 0-80% of a phospholipid (=B); 0.01-99.98% of a long chain alcohol having >20 C-atoms in the alcohol chain, while the amount of (A)+(B)≧0.02% and incorporating this blend in a fat-continuous emulsion.

Abstract: A process for preparing a material B comprising geometrical isomers L1 and L2 of conjugated linoleic acid moieties in a specific weight ratio of XB wherein a material A selected from free fatty acids, mono-, di- or tri-glycerides, phospholipids, alkyl esters or wax-esters containing at least 5 weight % of L1 and L2 are subjected to enzymatic conversion using an enzyme that can discriminate between L1 and L2 so that the original weight ratio of L1 to L2 of XA in the starting material is increased to XB where XB is equal to or greater than 1.1 XA. Advantageously, the isomers L1 and L2 are cis9, trans11 and trans10, cis12 linoleic acid or vice versa. The enzyme is advantageously a lipase obtained from Geotrichum candidum or Candida rugosa or a phospholipase. The starting material A may be, for example, a fish oil or vegetable oil. The resulting products may be blended with a complementary fat and may be used as foods or food supplements or in pharmaceutical compositions.