Mammary transfer of vitamin E in cows treated with vitamin A or linoleic acid.
The effect of an intravenous injection of vitamin A alcohol and subcutaneous injections of linoleic acid on the mammary transfer of an intravenous injection of vitamin E acetate was studied with 15 Holstein cows. The cows received either an intravenous injection of 3 g vitamin E acetate (controls), intravenous injections of 3 g vitamin E acetate and 1 million IU vitamin A alcohol, or an intravenous injection of 3 g vitamin E acetate and subcutaneous injections totaling 40 g of linoleic acid. Milk samples were at 12-h intervals, two prior to and six following treatment. The main influence of vitamin A alcohol and linoleic acid on mammary transfer of vitamin E was to delay secretion of vitamin E in milk. However, total secretion of vitamin E was not reduced by injection of either vitamin A alcohol or linoleic acid. Vitamin E injection produced substantial increases in vitamin E in milk, but less than 1% of the dose could be accounted for in the milk.
D000818:Animals; D002417:Cattle / Q000378:metabolism*; D005260:Female; D007275:Injections, Intravenous; D007279:Injections, Subcutaneous; D008041:Linoleic Acids / Q000494:pharmacology*; D008892:Milk / Q000378:metabolism*; D014801:Vitamin A / Q000494:pharmacology*; D014810:Vitamin E / Q000008:administration & dosage / Q000378:metabolism*
D008041:Linoleic Acids; D014801:Vitamin A; D014810:Vitamin E