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Protecting Dietary Vitamin C and High Oleic Oil in Feed and its Effect on the Nutritional Profile of Goat Milk

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Author(s): Jung Hoon Lee | Arnold M. Saxton | Lester O. Pordesimo | John C. Waller | Sharon L. Melton

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 5;
Issue: 1;
Start page: 30;
Date: 2006;
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Keywords: Feed Supplement | protected nutrient | vitamin C | high-oleic oil | goat | milk | ruminant

ABSTRACT
Protecting dietary vitamin C and high oleic oil from ruminal degradation by formulating these nutrients within a formaldehyde-free feed supplement and its effects on the nutritional profile of goat milk were investigated. Two protein-oil gel supplements (PGS), both containing high oleic sunflower oil (oleic acid source) and ascorbyl palmitate (vitamin C source), one based on casein (C-PGS) and the other based on keratin (K-PGS), were prepared and included in lactating goat diets. Both increased unsaturated fat content in goat milk, but only feeding with C-PGS resulted in a significant increase. K-PGS increased vitamin C in goat blood serum but not in milk. Blood serum vitamin C concentration for protein-oil gel supplement diets and unprotected ascorbyl palmitate diet were similar, so protection of vitamin C was questionable. The two protein-oil gel supplements increased concentration of oleic acid in both blood serum and milk with a corollary decrease in hypercholesteremic fatty acids.
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