Vet Med - Czech, 2006, 51(3):93-100 | DOI: 10.17221/5526-VETMED

Iodine content in consumer hen eggs

J. Travnicek1, V. Kroupova1, I. Herzig2, J. Kursa1
1 Department of Anatomy and Physiology of Farm Animals, Faculty of Agriculture, University of South Bohemia in Ceske Budejovice, Ceske Budejovice, Czech Republic
2 Veterinary Research Institute, Brno, Czech Republic

This paper presents the latest information about the supply of iodine to meet its requirements in hens of laying type, on the basis of iodine content in egg yolk and about the importance of eggs as an iodine source in human nutrition. The Sandell-Kolthoff method was applied to determine iodine content in the yolk of eggs from 9 large flocks (54 eggs) and 16 small flocks (96 eggs) in 2004, and from 10 large flocks (135 eggs) and 15 small flocks (114 eggs) in 2005. Iodine content was also determined in the albumen of 70 eggs. In 2004, the iodine content in the yolk of eggs from large flocks was 1 014.1 ± 356.6 while in 2005 it amounted to 1 663.8 ± 1 179.7 µg/kg fresh matter (P < 0.01); the respective values for the yolk of eggs from small flocks in 2004 and 2005 were 307.1 ± 255.7 and 519.5 ± 508.2 µg/kg fresh matter (P < 0.01). Compared to 1996, in 2005, the iodine content in yolk increased by 123.7% in large flocks, and by 19.2% in small flocks. The iodine content in albumen was 16.2 ± 9.7 µg/kg fresh matter, and it accounted for 2.6-5.0% of the total iodine content in 1 egg. The correlation coefficient between iodine contents in yolk and albumen was r = 0.67. In the Czech Republic, 1 egg from large flocks contains on average 31.2 µg iodine while 1 egg from small flocks contains 10.0 µg. Eggs from large flocks cover 7-14% and from small flocks 2.2-4.4% of the daily iodine requirement in adults. Iodine concentrations exceeding 2 500 µg/kg yolk fresh matter in large flocks were measured between week 32 and 60 of the laying cycle and with daily intake of 0.116-0.132 mg iodine per hen.

Keywords: iodine supplementation; yolk; albumen; iodine need

Published: March 31, 2006  Show citation

ACS AIP APA ASA Harvard Chicago IEEE ISO690 MLA NLM Turabian Vancouver
Travnicek J, Kroupova V, Herzig I, Kursa J. Iodine content in consumer hen eggs. Vet Med-Czech. 2006;51(3):93-100. doi: 10.17221/5526-VETMED.
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. Bednar J., Rohling S., Vohnout S. (1964): Determination of protein iodine content in blood serum (in Czech). Ceskoslovenska Farmacie, 13, 203-209. Go to PubMed...
    2. Bobek S. (1998): Iodine prophylaxis in animals (in Polish). Medycyna Weterynaryjna, 54, 80-86.
    3. Borkovcova I., Rehurkova I. (2001): Study of iodine exposure in foodstuffs (in Czech). Report of the National Institute of Public Health. 6, 5-8.
    4. Garwin J.L., Morgan J.M., Stowell R.L., Richardson M.P., Walker M.C., Capuzzi D. (1992): Modified eggs are compatible with a diet that reduces serum cholesterol concentration in humans. Journal of Nutrition, 122, 2153-2160. Go to original source... Go to PubMed...
    5. Jeroch H., Strobel E. (1999): Probleme und Lösungswege einer bedarfsgerechten Energie- und Nährstoffversorgung von unter den Bedingungen des ökologischen Landbaus gehaltenem Geflügel, dargestellt am Beispiel der Legehenne. In: Tagung: Ökologische Erzeugung von Geflügelfleisch und Eiren, 13.-14. April, University of Halle, 51-58.
    6. Kaufmann S. (1997): Ergänzende Strategien zur Bekämpfung von Jodmangel in Deutschland und Südostasien: Jodanreicherung in lebensmitteln tierischen Ursprungs. [Dissertation.] Institut für Ernährungswissenschaft der Technischen Universität, München. 95 pp.
    7. Kaufmann S., Wolfram G., Delange F., Rambeck W.A. (1998): Iodine supplementation of laying hen feed: A supplementary measure to eliminate iodine deficiency in humans? Zeitschrift für Ernährungswissenschaft, 37, 288-293. Go to original source... Go to PubMed...
    8. Krajcovicova-Kudlackova M., Buckova K., Klimes I., Sebokova E. (2001): Iodine deficiency at alternative and traditional nutrition. Bulletin of Food Research (Slovak Republic), 40, 311-319.
    9. Kroupova V., Travnicek J., Kursa J., Kratochvil P., Krabacova I. (1999): Iodine content in egg yolk during its excessive intake by layng hens. Czech Journal of Animal Science, 44, 369-376.
    10. Kursa J., Herzig I., Travnicek J., Kroupova V. (2005): Milk as a food source of iodine for human consumption in the Czech Republic. Acta Veterinaria Brno, 74, 255-264. Go to original source...
    11. McDowell L.R. (1992): Minerals in Animal and Human Nutrition. Academic Press Inc. Harcourt Brace Jovanovich. 524 pp.
    12. Richter G. (1995): Einfluß der Jodversorgung der Legehennen auf den Jodgehalt im Ei. Mengen - und Spurenelemente. 15. Arbeitstagung, Verlag Harald Schubert, Leipzig. 457-464.
    13. Roubalova M. (2005): Poultry and Eggs. Situation and prospect report of the Ministry of Agriculture of the Czech Republic (in Czech). 36 pp.
    14. Stransky M., Rysava L. (1997): Iodine excess diseases (in Czech). Vyziva a Potraviny, 52, 119. Go to original source...
    15. Underwood E.J. (1977): Trace Elements in Human and Animal Nutrition. Academic Press, A Subsidiary of Harcourt Brace Jovanovich. 545 pp. Go to original source...
    16. Ungelenk M.B. (2000): Algen als Jodquelle in der Legehennenfütterung. Möglichkeit zur Verbesserung der Jodversorgung des Menschen. [Inaugural-Dissertation.] Ludwig-Maxmilians-Universität, München, 166 pp.
    17. Zelenka J., Zeman L., Koci S., Kocova Z. (1993): Nutrition requirements and poultry feed value - Table. Animal Feeding Society (in Czech). 54 pp.

    This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY NC 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.


    Return to the content