Utilization and Excretion of Ascorbic Acid by the Dairy Cow

Knight, C.A.; Dutcher, R. Adams; Guerrant, N. B.; Bechdel, S. I.

doi:10.3168/jds.s0022-0302(41)95436-x

Cited by 36 publications

(21 citation statements)

References 21 publications

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“…showed that vitamin C is quickly degraded in vitro and in vivo (Knight et al, 1941;Vavich et al, 365 1945), presumably by rumen microbes. However Hidiroglou (1999) found that cows fed vitamin 366 This study determined effects of feeding a citrus extract (CE) to high producing dairy cows 25 during summer heat on measures of heat stress, as well as milk production and composition, in a 26…”

Section: Milk Somatic Cell Count (Scc) Response To Citrus Extracts 339mentioning

confidence: 96%

“…showed that vitamin C is quickly degraded in vitro and in vivo (Knight et al, 1941;Vavich et al, 362 1945), presumably by rumen microbes. However Hidiroglou (1999) found that cows fed vitamin 363 Thus it is possible that in a generally healthy mammary gland, such as was the case of cows in 376 our study based upon relatively low overall milk SCC counts, supplemental vitamin C may have 377 helped maintain a high antioxidant/pro-oxidant ratio, thereby aiding in prevention of oxidative 378 damage.…”

Section: Effects Of Feeding Citrus Pulp or Limonene In An Eo Blend Onmentioning

confidence: 96%

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Intake, milk production and heat stress of dairy cows fed a citrus extract during summer heat

Havlin

Robinson

2015

Animal Feed Science and Technology

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Section: Milk Somatic Cell Count (Scc) Response To Citrus Extracts 339mentioning

confidence: 96%

Section: Effects Of Feeding Citrus Pulp or Limonene In An Eo Blend Onmentioning

confidence: 96%

Intake, milk production and heat stress of dairy cows fed a citrus extract during summer heat

Havlin

Robinson

2015

Animal Feed Science and Technology

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“…This is due to the fact that rapid and pronounced destruction in the rumen of ingested ascorbic acid was reported as early as 1940 (Knight et al, 1941 (Kolb et al, 1993 (Hidiroglou and Batra, 1996). All (Behrens and Nadere, 1987).…”

mentioning

confidence: 99%

Comparison of vitamin C bioavailability after multiple or single oral dosing of different formulations in sheep

Hidiroglou¹,

Batra²,

Zhao³

1997

Reprod. Nutr. Dev.

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Summary ― The purpose of this study was to compare the bioavailability of either multiple or single oral supplementation of different formulations of vitamin C and intra-duodenal supplementation of one form of vitamin C in sheep. Formulations used in the study were ( 1 ) ascorbic acid fine powder (AA); (2) ascorbic acid coated with ethyl cellulose (EC); (3) Rovimix STAY-C (SC); (4) sodium ascorbate (SA); (5) Rovimix C (RC). The

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“…On the whole, none of these factors exerted any marked effects and the vitamin C content fluctuated around the usual figure of about 2 mg./lOO ml. When large quantities of the vitamin were injected intravenously there was a slight but definite rise in the level in the milk, but the bulk was excreted in the urine (192). Work by Wallis(i89,i90) gives further proof that the vitamin C content of milk and blood plasma is independent of that of the diet, values for cows receiving a deficient ration being as high as for cows on pasture.…”

Section: (Iv) Vitamin Cmentioning

confidence: 99%

Section D. The Nutritional Value of Milk and Milk Products

Kon

1943

Journal of Dairy Research

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Reviews of the progress of dairy science Thompson (30). Simple rapid methods for the measurement of the yellow colour of milk by means of a 'lactochrometer'(3i) and of carotene in butter fat by visual comparison with potassium bichromate standards (32) have been described. Effern(33) has applied the reaction of Rosenthal & Erdely(34) to the photometric estimation of vitamin A in butter, but the value of this method is not proven and the calculations are open to criticism.In previous reviews (35,36,37) papers dealing with the apparently abnormal behaviour of vitamin A and carotene in butter were discussed, but evidence is now growing that the vitamin A . activity of milk or butter calculated from proper chemical and physical measurements of vitamin A and carotene agrees with results of biological assay (25,38). The recent results of Fraps et al. {39) correcting their earlier findings also point in the same direction, while Shrewsbury & Kraybill(40) now report that carotene dissolved in butter fat devoid of vitamin A activity has the same availability for rats as when dissolved in cotton-seed or maize oil. On the other hand, Koehn(27,28) is still of the opinion that the factor for converting colorimetric readings into international units of vitamin A is appreciably higher for milk than for cod-liver oil.Normally the fat-soluble pigment of milk consists mostly of /? carotene and the ratio of 94 % j8 carotene and 6 % xanthophylls put forward by Gillam(4i) has been generally accepted. It has been known, however, for some time that the exact proportions vary according to the composition of the carotenoids in the fodder of the cow(37). More recent work in which the analysis was done by chromatography instead of by phase separation indicates that even in normal milk the contribution of /3 carotene may be smaller than hitherto believed, while special feeding of the cow may result in the appearance in the milk of much inactive carotenoid. Thus Johnson et al. (42,43) found in the butter of cows receiving molasses lucerne silage only 68 % of the total carotenoids in the form of /} carotene, the rest consisting of xanthophylls, 24 %, and 'acidformed' pigments(44), 8 %. Phosphoric acid lucerne silage yielded 65 % ft carotene and a higher proportion, 12 %, of pigments formed by the action of acid. Even pasture butter had 20 % of xanthophyllic pigments, but artefacts were absent and carotene amounted to 80 % (42,43). Similar values for pasture butters are reported by Thompson et aZ.(45) who also observed that Guernsey cows are less selective than Shorthorns and pass into their milk under comparable conditions a larger proportion of inactive carotenoids. This is doubtless another expression of the known peculiarities of carotenoid metabolism of the Channel Island cattle. There are further examples of these peculiarities. Thus, Gillam & Kon(46) showed that the Shorthorn cow effectively excludes lycopene, an isomer of carotene, from her milk, even when large quantities of it are fed in the form of tomato puree. Under similar...

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Utilization and Excretion of Ascorbic Acid by the Dairy Cow

Cited by 36 publications

References 21 publications

Intake, milk production and heat stress of dairy cows fed a citrus extract during summer heat

Intake, milk production and heat stress of dairy cows fed a citrus extract during summer heat

Comparison of vitamin C bioavailability after multiple or single oral dosing of different formulations in sheep

Section D. The Nutritional Value of Milk and Milk Products

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