Mammary Transfer of Vitamin E in Dairy Cows

摘要: Abstract Milk vitamin E from eight dairy cows was analyzed for by HPLC during the 1st mo of lactation. Colostrum gave a mean value 1.9 μg α-tocopherol/ml while concentrations fresh milk averaged .3 μg α-tocopherol/ml. D-γ-tocopherol were observed in very small amounts. When six at end lactation injected intraperitoneally with an emulsion dl-α-tocopherol acetate (5 g), plasma and α-tocopherol increased their original values 4.5 μg/ml .3 μg/ml to 10.9 μg/ml 1.6 μg/ml milk, 12 h later. The results show that intraperitoneal administration effective way increasing tocopherol concentration.