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Influence of duration of grazing on the fatty acid profile of M. Longissimus dorsi from beef heifers

Published online by Cambridge University Press:  20 November 2017

F. Noci ,
A. P. Moloney ,
P. French  and
F. J. Monahan
F. Noci*
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland Department of Food Science, University College Dublin, Belfield, Dublin 4, Ireland
A. P. Moloney
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
P. French
Affiliation:
Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland
F. J. Monahan
Affiliation:
Department of Food Science, University College Dublin, Belfield, Dublin 4, Ireland
*
Email: fnoci@grange.teagasc.ie
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Extract

Current medical advice is to reduce consumption of saturated fat, in favour of polyunsaturated fat, and to increase the consumption of ω-3 polyunsaturated fatty acids (PUFAs) at the expense of ω-6 PUFAs. Fat of ruminant origin, although it has a nutritionally favourable ω-6: ω-3 ratio, is rich in saturated fatty acids (SFAs), which have been linked to incidence of coronary heart disease in humans. However, when compared to non-ruminant fat, fat of ruminant origin has a high concentration of conjugated linoleic acid (CLA), which is considered to have anticarcinogenic properties (Belury, 1995). Grass finishing of cattle increased the concentration of CLA and the PUFA:SFA ratio (P:S) when compared with concentrate-based finishing (French et al., 2000). The objective of this study was to investigate the relationship between duration of grass-finishing of cattle and the fatty acid profile of intramuscular lipid.

Type
ISAE
Information
Proceedings of the British Society of Animal Science , Volume 2003 , 2003 , pp. 23
Copyright
Copyright © The British Society of Animal Science 2003

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References

French, P., Stanton, C., Lawless, F., O’Riordan, E.G., Monahan, F.J., Caffrey, P.J. and Moloney, A.P. 2000. Fatty acid composition, including conjugated linoleic acid, of intramuscular fat from steers offered grazed grass, grass silage, or concentrate based diets. Journal of Animal Science 78: 2849–2855 Google Scholar
Belury, M.A. 1995. Conjugated dienoic linoleate: A polyunsaturated fatty acid with unique chemoprotective properties. Nutrition Reviews. 53: 83–89 CrossRefGoogle ScholarPubMed