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Cheese manufacture with milk with elevated conjugated linoleic acid levels caused by dietary manipulation.
J Dairy Sci. 2007 Jun; 90(6):2919-27.JD

Abstract

The objective of this study was to assess the effect of dietary supplementation of cows on pasture with sunflower oil for conjugated linoleic acid (cis-9, trans-11 CLA) enrichment of milk, for the production of CLA-enriched cheese. A group of 40 autumn-calving dairy cows were assigned to either a control group (indoor feeding on grass silage ad libitum and 6 kg/d of a typical indoor concentrate) or an experimental group (on pasture, being fed 6 kg of a supplement containing 100 g/kg of sunflower oil per d). These diets were fed for 16 d, during which time milk was collected for pilot-scale hard cheese manufacture. The pasture-based diet with sunflower oil resulted in a significant effect on the milk fatty acid CLA content. The concentration of cis-9, trans-11 CLA in the milk produced from cows on this diet increased to 2.22 g/100 g of fatty acid methyl esters (FAME) after 14 d, compared with 0.46 g/100 g of FAME in milk produced on the control indoor diet. The content of cis-9, trans-11 CLA in the cheese manufactured from the indoor control milk was 0.78 g/100 g of FAME and that from the pasture-based sunflower oil milk was 1.93 g/100 g of FAME. The cheese was assessed during the ripening period and CLA concentrations were stable throughout the 6 mo of ripening. Other cheese variables (microbiology, composition, flavor, free AA) were monitored during the ripening period, and the cheese with the elevated CLA concentrations compared favorably with the control cheese. Thus, a pasture-based diet supplemented with an oil source rich in linoleic acid resulted in an enhanced CLA content of bovine milk fat, compared with an indoor grass silage-based diet.

Authors+Show Affiliations

Teagasc, Moorepark Food Research Centre, Fermoy, Co. Cork, Ireland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17517732

Citation

Coakley, M, et al. "Cheese Manufacture With Milk With Elevated Conjugated Linoleic Acid Levels Caused By Dietary Manipulation." Journal of Dairy Science, vol. 90, no. 6, 2007, pp. 2919-27.
Coakley M, Barrett E, Murphy JJ, et al. Cheese manufacture with milk with elevated conjugated linoleic acid levels caused by dietary manipulation. J Dairy Sci. 2007;90(6):2919-27.
Coakley, M., Barrett, E., Murphy, J. J., Ross, R. P., Devery, R., & Stanton, C. (2007). Cheese manufacture with milk with elevated conjugated linoleic acid levels caused by dietary manipulation. Journal of Dairy Science, 90(6), 2919-27.
Coakley M, et al. Cheese Manufacture With Milk With Elevated Conjugated Linoleic Acid Levels Caused By Dietary Manipulation. J Dairy Sci. 2007;90(6):2919-27. PubMed PMID: 17517732.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cheese manufacture with milk with elevated conjugated linoleic acid levels caused by dietary manipulation. AU - Coakley,M, AU - Barrett,E, AU - Murphy,J J, AU - Ross,R P, AU - Devery,R, AU - Stanton,C, PY - 2007/5/23/pubmed PY - 2007/8/10/medline PY - 2007/5/23/entrez SP - 2919 EP - 27 JF - Journal of dairy science JO - J Dairy Sci VL - 90 IS - 6 N2 - The objective of this study was to assess the effect of dietary supplementation of cows on pasture with sunflower oil for conjugated linoleic acid (cis-9, trans-11 CLA) enrichment of milk, for the production of CLA-enriched cheese. A group of 40 autumn-calving dairy cows were assigned to either a control group (indoor feeding on grass silage ad libitum and 6 kg/d of a typical indoor concentrate) or an experimental group (on pasture, being fed 6 kg of a supplement containing 100 g/kg of sunflower oil per d). These diets were fed for 16 d, during which time milk was collected for pilot-scale hard cheese manufacture. The pasture-based diet with sunflower oil resulted in a significant effect on the milk fatty acid CLA content. The concentration of cis-9, trans-11 CLA in the milk produced from cows on this diet increased to 2.22 g/100 g of fatty acid methyl esters (FAME) after 14 d, compared with 0.46 g/100 g of FAME in milk produced on the control indoor diet. The content of cis-9, trans-11 CLA in the cheese manufactured from the indoor control milk was 0.78 g/100 g of FAME and that from the pasture-based sunflower oil milk was 1.93 g/100 g of FAME. The cheese was assessed during the ripening period and CLA concentrations were stable throughout the 6 mo of ripening. Other cheese variables (microbiology, composition, flavor, free AA) were monitored during the ripening period, and the cheese with the elevated CLA concentrations compared favorably with the control cheese. Thus, a pasture-based diet supplemented with an oil source rich in linoleic acid resulted in an enhanced CLA content of bovine milk fat, compared with an indoor grass silage-based diet. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/17517732/Cheese_manufacture_with_milk_with_elevated_conjugated_linoleic_acid_levels_caused_by_dietary_manipulation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(07)70103-0 DB - PRIME DP - Unbound Medicine ER -