Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk.

Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk. Research Abstract Details 

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Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk. Abstract Text:

S K Gulati,C Wijesundera,E Byers,T W Scott,

Background - Conjugated linoleic acids (CLA's) are extensively bio-hydrogenated in the rumen by rumen micro-organisms. When CLA's are infused into the abomasum of dairy cows, milk fat content is reduced by 30-40%; the effect is due to the trans 10 cis 12 isomers. Objective - To protect CLA methyl esters (ME) from ruminal metabolism, (RP-ME-CLA) and to assess their effect on milk fat content and composition. Design - The basal ration of 6 goats was supplemented with RP-ME-CLA containing 10g each of cis 9 trans 11and 10 trans cis 12 isomers, to assess their effects on milk fat composition. Outcomes - RP-CLA-ME depressed milk fat content of goats by 35-40%; similar to CLA isomers infused into the abomasum (1) or where CLA-ME-calcium salts or RP-CLA-ME were infused intra-ruminally. Feeding RP-CLA-ME increased the level (g/100g) of cis 9 trans 11 and trans 10 cis 12 isomer in goat milk from 0.64 +/- 0.04 to 4.07 +/- 0.22 and 0.0 to 2.8 +/-0.17 respectively. The transfer of the cis 9 trans 11 and trans 10 cis 12 isomers from the supplement into milk fat was 20 and 13%respectively; values being higher than the transfer efficiency reported for cows where CLA-ME-calcium salts or RP-CLA-ME were infused intraruminally ie 3.2 and 7% respectively. Conclusions - CLA-ME can be protected from ruminal metabolism. Inclusion of RP-CLA-ME supplement in the diet reduced milk fat content by 35-40% and significantly increased the concentration of CLA isomers in milk.

Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk. Publishing Authors By Initials

SK Gulati,C Wijesundera,E Byers,TW Scott,

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Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Asia Pacific journal of clinical nutrition

VOLUME: 12 Suppl

Page Numbers: S44

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ISSN: 0964-7058

DAY: 16

MONTH: 03

YEAR: 2003

Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Rumen protected conjugated linoleic acid (CLA) methyl esters decrease milk fat and increase CLA concentration in goat milk.

AFFILIATION: Faculty of Veterinary Science, University of Sydney, NSW 2006.

Country: Australia

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MEDLINETA: Asia Pac J Clin Nutr

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