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- Title
An exploratory study of the content of vitamin D compounds in selected samples of Australian eggs.
- Authors
Liu, Jerry; Greenfield, Heather; Fraser, David Ross
- Abstract
Aim The aim of this study was to obtain preliminary indicative data for vitamin D3 (cholecalciferol) and 25-hydroxycholecalciferol (25 OHD3) in Australian chicken egg yolk ( Gallus gallus domesticus, Linnaeus, 1758), comparing data with the egg yolk of other species, crocodile ( Crocodylus porosus, Schneider, 1801) and salmon ( Salmo salar, Linnaeus, 1758). Methods Convenience samples of chicken eggs were obtained from a producer known to fortify feed with 25OHD3 as well as D3 (Brand A; n = 6), a producer with an unknown feeding protocol (Brand B; n = 6) and a producer known to use low levels of only feed vitamin D3 ( University of Sydney; n = 4). Salmon roe (50 g jar) was obtained from a retail outlet and crocodile eggs (n = 2) from a commercial crocodile farm. Egg yolks and whole salmon roe were analysed for vitamin D3 and 25OHD3 by high-performance liquid chromatography. Results Brand A and B chicken egg yolks contained 2.9 and 2.1 μg vitamin D3/100 g, respectively, while University of Sydney eggs contained lower concentrations (0.5 μg/100 g). Further, yolk from brand A and B chicken eggs contained 4.2 and 1.4 μg 25OHD3/100 g, respectively. Salmon roe contained 6.3 μg vitamin D3/100 g and vitamin D3 content of two crocodile egg yolks differed widely (10.9 and 0.7 μg/100 g). Conclusions The vitamin D in chicken eggs has the potential to contribute considerably to the vitamin D content of the Australian diet, up to 3.8 μg vitamin D equivalents per egg, depending on the form of feed vitamin D. Further representative samples of all edible or potentially edible Australian egg species require analysis for public health nutrition purposes.
- Subjects
AUSTRALIA; LIQUID chromatography; EGGS; ANIMAL experimentation; FISHES; POULTRY; REPTILES; RESEARCH; STATISTICAL sampling; SUNSHINE; VITAMIN D
- Publication
Nutrition & Dietetics, 2014, Vol 71, Issue 1, p46
- ISSN
1446-6368
- Publication type
Article
- DOI
10.1111/1747-0080.12056