Document Detail

Butter composition and texture from cows with different milk fatty acid compositions fed fish oil or roasted soybeans.
MedLine Citation:
PMID:  17517699     Owner:  NLM     Status:  MEDLINE    
Changing the milk fatty acid composition can improve the nutritional and physical properties of dairy products and their acceptability to consumers. A more healthful milk fatty acid composition can be achieved by altering the cow's diet, for example, by feeding supplemental fish oil (FO) or roasted soybeans (RSB), or by selecting cows with a more unsaturated milk fatty acid composition. We examined whether feeding supplemental FO or RSB to cows that had a more unsaturated milk fatty acid composition acted additively to produce butter with improved fatty acid composition and texture. Using a 3 x 3 Latin square design with 2 replications, we fed diets to multiparous Holstein cows (60 to 200 DIM) chosen for producing either more or less unsaturated milk fatty acid composition (n = 6 for each group) for three 3-wk periods. The control diet contained 3.7% crude fat and the 2 experimental diets contained, on a dry matter basis, 0.8% of additional lipids in the form of 0.9% of FO or 5% of RSB. The milk, collected in the third week of feeding, was used to make butter, which was analyzed for its fatty acid composition and physical properties. Dry matter intake, milk yield, and milk composition were not significantly affected by cow diet or by cow selection. Cows that produced a more unsaturated and healthful milk fat prior to the feeding study, according to a "health-promoting index" [HPI = (sum of % of unsaturated fatty acids)/ (%12:0 + 4 x %14:0 + %16:0)], maintained a higher HPI in their butter during the feeding study than did cows with a low HPI. Milk from cows fed supplemental FO or RSB yielded more unsaturated butters with a higher HPI. This butter also was softer when the cows were fed RSB. Feeding RSB to cows chosen for their high milk HPI yielded the most unsaturated butter with the highest HPI and softest texture. Thus, selecting cows with a more health-promoting milk fatty acid composition and feeding supplemental RSB can be used in combination to produce butter that has a consumer-friendly texture and a healthful fatty acid profile.
G Bobe; S Zimmerman; E G Hammond; A E Freeman; P A Porter; C M Luhman; D C Beitz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  90     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-05-22     Completed Date:  2007-08-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2596-603     Citation Subset:  IM    
Department of Animal Science, Iowa State University, Ames 50011, USA.
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MeSH Terms
Animal Feed
Animal Nutritional Physiological Phenomena
Butter / analysis*,  standards
Cattle / metabolism,  physiology*
Fatty Acids / analysis*
Fatty Acids, Unsaturated / analysis
Fish Oils / administration & dosage,  metabolism*
Health Food
Lactation / metabolism
Milk / chemistry*,  secretion
Random Allocation
Soybeans / metabolism*
Reg. No./Substance:
0/Fatty Acids; 0/Fatty Acids, Unsaturated; 0/Fish Oils; 8029-34-3/Butter

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