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South African preschool children habitually consuming sheep liver and exposed to vitamin A supplementation and fortification have hypervitaminotic A liver stores: a cohort study.
Am J Clin Nutr
July 2019
Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI.
Background: In some regions, multiple vitamin A (VA) interventions occur in the same target groups, which may lead to excessive stores. Retinol isotope dilution (RID) is a more sensitive technique than serum retinol to measure VA status.
Objective: We evaluated VA status before and after a high-dose supplement in preschool children living in a region in South Africa with habitual liver consumption and exposed to VA supplementation and fortification.
Hypervitaminosis A in lambs fed milk replacer.
Vet Rec
November 2012
AHVLA Thirsk, Station Road, Thirsk, North Yorkshire YO7 1PZ, UK.
The effects of hypervitaminosis A in sheep following intramuscular administrations of vitamin A.
Food Chem Toxicol
January 2010
Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tehran, PO Box 14155-6453, Tehran, Iran.
Ten ewe lambs (median age 11 months and average weight 29.2+/-2.5 kg) were used in the present study.
View Article and Find Full Text PDFAdult cockatiels (Nymphicus hollandicus) at maintenance are more sensitive to diets containing excess vitamin A than to vitamin A-deficient diets.
J Nutr
June 2003
Department of Animal Science, School of Veterinary Medicine. California Animal Health and Food Safety Lab, University of California-Davis, Davis, CA 95616, USA.
The purpose of this experiment was to examine the physiological responses of adult cockatiels at maintenance to dietary vitamin A (VA) concentrations, and to identify concentrations associated with deficiency and toxicity. Adult cockatiels at maintenance (n = 22, 2-3 y of age) were fed a diet of 0, 600, 3000 or 30,000 microg VA/kg (0, 2000, 10,000 or 100,000 IU), and monitored for signs of VA deficiency or toxicity for up to 706 d. The analyzed diet concentrations were 0, 835, 2815 and 24,549 microg/kg, respectively.
View Article and Find Full Text PDFHypercalcemia and hypervitaminosis D in two lambs.
J Am Vet Med Assoc
April 2000
Department of Large Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg 24061-0442, USA.
Twin 17-day-old crossbred male lambs were examined to determine the cause of weakness and failure to thrive. Hypercalcemia attributable to hypervitaminosis D was diagnosed. The milk replacer or an accidental overdose of an injectable vitamin D product was suspected to be the source, although a definite cause was not confirmed.
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