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Journal of Dairy Science
Bar, A., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Sachs, M., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Perlman, R., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Concentration of vitamin D metabolites was determined in the milk of control and 1α-hydroxyvitamin D3-injected (700 μg) cows that calved 36 to 43 h after treatment. Milk samples were taken 60 h after calving. Concentrations of vitamin D, 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and 1,25-dihydroxyvitamin D in milk of the control cows were 372 ± 24, 264 ± 68, 68 ± 26, and 21 ± 3 ng/L, respectively. Concentrations of vitamin D metabolites in the milk of the treated cows did not differ significantly from those of controls. Concentration of 1α-hydroxyvitamin D3 in milk of treated cows was less than 20 ng/L. In a second experiment, cows were injected twice, at 72-h intervals, with 350 μg 1α-hydroxyvitamin D3. Milk was taken 60 h after parturition from cows that calved 37 to 60 h after the second injection. The vitamin D3 equivalence of the milk was 40 ± 3 IU/L. Results indicate that injection of 700 μg 1α-hydroxyvitamin D3 did not affect the concentration of vitamin D metabolites or the vitamin D3 equivalence of milk taken 60 h after calving. © 1986, American Dairy Science Association. All rights reserved.
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Use of 1α-Hydroxyvitamin D3 to Prevent Bovine Parturient Paresis. VI. Concentrations of Vitamin D Metabolites and Vitamin D3 Equivalence in Milk
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Bar, A., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Sachs, M., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Perlman, R., Institute of Animal Science, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Use of 1α-Hydroxyvitamin D3 to Prevent Bovine Parturient Paresis. VI. Concentrations of Vitamin D Metabolites and Vitamin D3 Equivalence in Milk
Concentration of vitamin D metabolites was determined in the milk of control and 1α-hydroxyvitamin D3-injected (700 μg) cows that calved 36 to 43 h after treatment. Milk samples were taken 60 h after calving. Concentrations of vitamin D, 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and 1,25-dihydroxyvitamin D in milk of the control cows were 372 ± 24, 264 ± 68, 68 ± 26, and 21 ± 3 ng/L, respectively. Concentrations of vitamin D metabolites in the milk of the treated cows did not differ significantly from those of controls. Concentration of 1α-hydroxyvitamin D3 in milk of treated cows was less than 20 ng/L. In a second experiment, cows were injected twice, at 72-h intervals, with 350 μg 1α-hydroxyvitamin D3. Milk was taken 60 h after parturition from cows that calved 37 to 60 h after the second injection. The vitamin D3 equivalence of the milk was 40 ± 3 IU/L. Results indicate that injection of 700 μg 1α-hydroxyvitamin D3 did not affect the concentration of vitamin D metabolites or the vitamin D3 equivalence of milk taken 60 h after calving. © 1986, American Dairy Science Association. All rights reserved.
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