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The Iodine Group | |
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Kirk
Perchlorate and iodide in dairy and breast milk.Kirk AB, Martinelango PK, Tian K, Dutta A, Smith EE, Dasgupta PK. Environ Sci Technol. 2005 Apr 1;39(7):2011-7.
"Perchlorate inhibits
iodide uptake and may impair thyroid and neurodevelopment in
infants. Recently, we unambiguously identified the presence of
perchlorate in all seven brands of dairy milk randomly purchased
from grocery stores in Lubbock, TX. How widespread is perchlorate
in milk? Perchlorate in 47 dairy milk samples from 11 states and
in 36 human milk samples from 18 states were measured. Iodide was
also measured in a number of the samples. Perchlorate was
detectable in 81 of 82 samples. The dairy and breast milk means
were, respectively, 2.0 and 10.5 microg/L with the corresponding
maximum values of 11 and 92 microg/L. Perchlorate is present in
virtually all milk samples, the average concentration in breast
milk is five times higher than in dairy milk. Although the number
of available measurements are few at this point, for breast milk
samples with a perchlorate content greater than 10 microg/L, the
iodide content is linearly correlated with the inverse of the
perchlorate concentration with a r2 of >0.9 (n = 6). The presence
of perchlorate in the milk lowers the iodide content and may
impair thyroid development in infants. On the basis of limited
available data, iodide levels in breast milk may be significantly
lower than it was two decades ago. Recommended iodine intake by
pregnant and lactating women may need to be revised upward." |
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