title: Composition and distribution of fatty acids in triglycerides from goat infant formulas with milk fat.
abstract: Most infant formulas use vegetable oils in place of milk fat to provide an overall fatty acid profile similar to that of breast milk. Vegetable oils have 5 to 20% saturated fatty acids in the sn-2 position of triglycerides unless they are modified by interesterification. Interesterification is increasingly used for the fat for infant formulas to raise the level of saturated fatty acids in the sn-2 position to 40 to 60%. The objective of this study was to verify an alternative approach to providing the appropriate fatty acid profile, including in the sn-2 position, for a goat infant formula. In this method, 55% of total fat was made from goat milk fat and 45% from a mixture of unmodified high oleic sunflower, canola, and sunflower oils in a ratio of 44:30:26. The fatty acid profile was measured by gas-liquid chromatography and the relative percentage of fatty acids in the sn-2 position of triglycerides was measured via partial deacylation with Grignard reagent using trimethylsilyl derivatives of monoacylglycerols. Mixing goat milk fat with vegetable oils produced a formula with a profile of essential fatty acids and a ratio of linoleic:alpha-linolenic fatty acids within the required interval of 5 to 15:1 recommended for infant formula. The proportion of palmitic acid in the sn-2 position was 31%.
authors.affiliation: Dairy Goat Co-operative (NZ) Ltd., 3240 Hamilton, New Zealand. colin@dgc.co.nz
authors.forename: C G
authors.initials: CG
authors.lastname: Prosser
authors.forename: V I
authors.initials: VI
authors.lastname: Svetashev
authors.forename: M V
authors.initials: MV
authors.lastname: Vyssotski
authors.forename: D J
authors.initials: DJ
authors.lastname: Lowry
mesh_terms: D000818:Animals; D002417:Cattle; D005223:Fats / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis / Q000737:chemistry*; D006041:Goats; D006801:Humans; D007223:Infant; D041943:Infant Formula / Q000737:chemistry*; D008892:Milk / Q000737:chemistry; D014280:Triglycerides / Q000737:chemistry*
chemical_list: D005223:Fats; D005227:Fatty Acids; D014280:Triglycerides