Understanding and controlling variability of iodine concentration in bulk-tank milk in Canada

Authors

  • K. MacDonald AVC Health Management Department, University of PEI, Charlottetown, PE, Canada, C1A 4P3
  • G. Keefe AVC Health Management Department, University of PEI, Charlottetown, PE, Canada, C1A 4P3
  • J. Sanchez AVC Health Management Department, University of PEI, Charlottetown, PE, Canada, C1A 4P3
  • J. P. Roy Faculté de médecine vétérinaire, Université de Montréal, St-Hyacinthe, QC, Canada, J2S 7C6
  • D. Kelton OVC Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1
  • S. Hendrick WCVM Field Service Department, University of Saskatchewan, Saskatoon, SK, Ontario, S7N 0W3

DOI:

https://doi.org/10.21423/aabppro20123902

Keywords:

iodine, bulk-tank milk, feeding management, micronutrient, BTM testing

Abstract

Iodine is an essential micronutrient for dairy cattle and humans to maintain adequate metabolism. Feeding management practices for dairy cattle are aimed at achieving the recommended intake of micronutrients for optimal health. Testing has shown that iodine concentrations in bulk-tank milk (BTM) are highly variable between herds. While the current iodine concentration in retail milk does not present a substantial risk to human health, Health Canada has recommended an interim upper limit of 500 ppm of iodine in BTM. The objectives of this project were to determine the primary sources of variability for BTM iodine concentration and provide recommendations for best management practices to maintain BTM iodine concentrations within acceptable limits.

Cover image of the 45th Conference Proceedings: Three black-and-white cows lounge in a spring field. Yellow background.

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Published

2012-09-20

Issue

2012

Section

Research Summaries 1

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