title: Use of re-esterified palm oils, differing in their acylglycerol structure, in fattening pig diets.
abstract: Re-esterified oils are new fat sources obtained from the chemical esterification of acid oils with glycerol (both economically interesting by-products from oil refining and biodiesel industries, respectively). The different fatty acid (FA) positional distribution and acylglycerol composition of re-esterified oils may enhance the apparent absorption of saturated fatty acids (SFA) and, therefore, their overall nutritive value, which might lead to an increased deposition of SFA. The aim of the present study was to investigate the potential use of re-esterified palm oils, in comparison with their corresponding acid and native oils in fattening pig diets, studying their effects on fatty acid apparent absorption, acylglycerol and free fatty acid (FFA) composition of feces, growth performance, carcass-fat depots and fatty acid composition of backfat. Seventy-two crossbred boars and gilts (average weight of 24.7 ± 2.55 kg) were blocked by initial BW (nine blocks of BW for each gender), housed in adjacent individual boxes, and fed one of the four dietary treatments, which were the result of a basal diet supplemented with 4% (as-fed basis) of native palm oil (PN), acid palm oil (PA), re-esterified palm oil low in mono- and diacylglycerols (PEL), or re-esterified palm oil high in mono- and diacylglycerols (PEH). Regarding results from the digestibility balance, PA and PN showed similar apparent absorption coefficients (P>0.05), despite the high, FFA content of the former. However, re-esterified palm oils (both PEL and PEH) showed a higher apparent absorption of total FA than did their corresponding native and acid oils (P0.05). We conclude that re-esterified oils are interesting fat sources to be considered in fattening pigs.
authors.affiliation: 1Animal Nutrition and Welfare Service (SNiBA),Department of Animal and Food Science,Facultat de Veterinària,Universitat Autònoma de Barcelona,E-08193 Bellaterra,Barcelona,Spain.
authors.forename: E
authors.initials: E
authors.lastname: Vilarrasa
authors.affiliation: 1Animal Nutrition and Welfare Service (SNiBA),Department of Animal and Food Science,Facultat de Veterinària,Universitat Autònoma de Barcelona,E-08193 Bellaterra,Barcelona,Spain.
authors.forename: A C
authors.initials: AC
authors.lastname: Barroeta
authors.affiliation: 2Nutrition and Food Science Department - XaRTA - INSA, Facultat de Farmàcia,Universitat de Barcelona,Joan XXIII s/n,E-08028 Barcelona,Spain.
authors.forename: A
authors.initials: A
authors.lastname: Tres
authors.affiliation: 3Monogastric Nutrition,Institut de Recerca i Tecnologia Agroalimentàries (IRTA),Ctra. de Reus-El Morell Km 3.8,E-43120 Constantí,Tarragona,Spain.
authors.forename: E
authors.initials: E
authors.lastname: Esteve-Garcia
mesh_terms: D065966:Absorption, Physicochemical; D000818:Animals; D001835:Body Weight; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements / Q000032:analysis*; D004951:Esterification; D005227:Fatty Acids / Q000378:metabolism*; D005230:Fatty Acids, Nonesterified / Q000378:metabolism*; D005243:Feces / Q000737:chemistry; D005260:Female; D005989:Glycerides / Q000737:chemistry / Q000493:pharmacokinetics; D008297:Male; D000073878:Palm Oil; D010938:Plant Oils / Q000737:chemistry / Q000493:pharmacokinetics*; D013552:Swine / Q000502:physiology*
chemical_list: D005227:Fatty Acids; D005230:Fatty Acids, Nonesterified; D005989:Glycerides; D010938:Plant Oils; D000073878:Palm Oil
keywords: absorption; diacylglycerols; fatty acids; monoacylglycerols; pigs