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  • Title: Fate of dietary perchlorate in lactating dairy cows: Relevance to animal health and levels in the milk supply.
    Author: Capuco AV, Rice CP, Baldwin RL, Bannerman DD, Paape MJ, Hare WR, Kauf AC, McCarty GW, Hapeman CJ, Sadeghi AM, Starr JL, McConnell LL, Van Tassell CP.
    Journal: Proc Natl Acad Sci U S A; 2005 Nov 08; 102(45):16152-7. PubMed ID: 16260728.
    Abstract:
    Perchlorate is a goitrogenic anion that competitively inhibits the sodium iodide transporter and has been detected in forages and in commercial milk throughout the U.S. The fate of perchlorate and its effect on animal health were studied in lactating cows, ruminally infused with perchlorate for 5 weeks. Milk perchlorate levels were highly correlated with perchlorate intake, but milk iodine was unaffected, and there were no demonstrable health effects. We provide evidence that up to 80% of dietary perchlorate was metabolized, most likely in the rumen, which would provide cattle with a degree of refractoriness to perchlorate. Data presented are important for assessing the environmental impact on perchlorate concentrations in milk and potential for relevance to human health.
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