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Bovine Serum Lipids IV. The Influence of Added Saturated and Unsaturated Fat to the Ration¹

University of Arizona, Tucson 85721

Abstract

The influence of either 6% added animal fat or safflower oil to the ration on bovine serum lipid levels and on the fatty acid composition of the four serum lipid fractions was investigated. Neither of the added fat diets had a significant effect on serum lipid levels. As the concentrate level of each diet was increased the serum lipid level decreased.

This study indicates that through dietary lipid treatment significant changes (P<.05) in the concentration of certain fatty acids within a particular lipid fraction are possible. Increased levels of unsaturated fatty acids in the serum of steers fed the 6% added safflower diet and not the 6% animal fat diet suggested that increased absorption of the fats themselves m ay have altered the characteristics of the serum fatty acids and thus the lipid metabolism of the animal.

¹ Arizona Agricultural Experiment Station Technical Paper 1879.

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