Enhancing the nutritional and health value of beef lipids and their relationship with meat quality
2014
Scollan, Nigel D | Dannenberger, Dirk | Nuernberg, Karin | Richardson, Ian | Mackintosh, Siân | Hocquette, Jean-François | Moloney, Aidan P | Institute of Biological, Environmental and Rural Sciences (IBERS) ; Biotechnology and Biological Sciences Research Council (BBSRC)-Aberystwyth University | Leibniz Institute for Farm Animal Biology (FBN) | Division of Farm Animal Science ; University of Bristol [Bristol] | Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH) ; Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS) | Animal and Grassland Research and Innovation Centre ; Irish Agriculture and Food Development Authority
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Mostrar más [+] Menos [-]Inglés. This paper focuses on dietary approaches to control intramuscular fat deposition to increase beneficial omega-3 polyunsaturated fatty acids (PUFA) and conjugated linoleic acid content and reduce saturated fatty acids in beef. Beef lipid trans-fatty acids are considered, along with relationships between lipids in beef and colour shelf-life and sensory attributes. Ruminal lipolysis and biohydrogenation limit the ability to improve beef lipids. Feeding omega-3 rich forage increases linolenic acid and long-chain PUFA in beef lipids, an effect increased by ruminally-protecting lipids, but consequently may alter flavour characteristics and shelf-life. Antioxidants, particularly α-tocopherol, stabilise high concentrations of muscle PUFA. Currently, the concentration of long-chain omega-3 PUFA in beef from cattle fed non-ruminally-protected lipids falls below the limit considered by some authorities to be labelled a source of omega-3 PUFA. The mechanisms regulating fatty acid isomer distribution in bovine tissues remain unclear. Further enhancement of beef lipids requires greater understanding of ruminal biohydrogenation.
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