Carotene and Vitamin A Metabolism in Cattle and Sheep on Phosphorus-Deficient Rations

Gallup, Willis D.; Thomas, O. O.; Ross, O. B.; Whitehair, C. K.

doi:10.2527/jas1953.124715x

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Interrelationships Of Vitamin a With Other Factors1

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1956

2009

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“…There are indications that there is an effect of phos phorus on vitamin A metabolism in that phosphorus decreases slightly the liver storage of vitamin A, but raises the plasma level of carotene in steers (74) and cows (233) fed supplementary carotene. This effect is not noticed on sheep, and may even be the reverse as regards liver stor age (74).…”

Section: Interrelationships Of Vitamin a With Other Factorsmentioning

confidence: 99%

The Vitamin a Requirement of the Young Pig

Frape¹,

Speer²,

Hays³

et al. 1959

The Journal of Nutrition

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Section: Interrelationships Of Vitamin a With Other Factorsmentioning

confidence: 99%

The Vitamin a Requirement of the Young Pig

Frape¹,

Speer²,

Hays³

et al. 1959

The Journal of Nutrition

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“…and cows (233) fed supplementary carotene. This effect is not noticed on sheep, and may even be the reverse as regards liver stor age(74).Selenium decreases carotene utilization and storageof preformed vitamin A in rats, but does not influence car otene storage(12).Vitamin A deficiency in rats has been suspected(151) as leading to scorbutic symptoms which could be cured by vitamin C. This relationship could not be corroborated by information obtained from the dairy cow(55), although blood ascorbic acid does decline in terminal vitamin A de ficiency. The accompanying anorexia cannot be alleviated by ascorbic acid administration.…”

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confidence: 97%