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Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia

Breast-fed infants may depend solely on an adequate supply of iodine in breast milk for the synthesis of thyroid hormones which are essential for optimal growth and cognitive development. This is the first study to measure breast milk iodine concentration (BMIC) among lactating women in Western Aust...

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Autores principales: Jorgensen, Anita, O’Leary, Peter, James, Ian, Skeaff, Sheila, Sherriff, Jillian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5133086/
https://www.ncbi.nlm.nih.gov/pubmed/27827913
http://dx.doi.org/10.3390/nu8110699
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author Jorgensen, Anita
O’Leary, Peter
James, Ian
Skeaff, Sheila
Sherriff, Jillian
author_facet Jorgensen, Anita
O’Leary, Peter
James, Ian
Skeaff, Sheila
Sherriff, Jillian
author_sort Jorgensen, Anita
collection PubMed
description Breast-fed infants may depend solely on an adequate supply of iodine in breast milk for the synthesis of thyroid hormones which are essential for optimal growth and cognitive development. This is the first study to measure breast milk iodine concentration (BMIC) among lactating women in Western Australian (n = 55). Breast milk samples were collected between 2014 and 2015 at a mean (±SD) of 38.5 (±5.5) days post-partum. The samples were analysed to determine median BMIC and the percentage of samples with a BMIC < 100 µg/L, a level considered adequate for breast-fed infants. The influence of (a) iodine-containing supplements and iodised salt use and (b) consumption of key iodine-containing foods on BMIC was also examined. The median (p25, p75) BMIC was 167 (99, 248) µg/L and 26% of samples had a BMIC < 100 µg/L. Overall, BMIC tended to be higher with iodine-containing supplement usage (ratio 1.33, 95% confidence interval (CI) (1.04, 1.70), p = 0.030), cow’s milk consumption (ratio 1.66, 95% CI (1.23, 2.23), p = 0.002) and lower for Caucasians (ratio 0.61, 95% CI (0.45, 0.83), p = 0.002), and those with secondary school only education (ratio 0.66, 95% CI (0.46, 0.96), p = 0.030). For most women, BMIC was adequate to meet the iodine requirements of their breast-fed infants. However, some women may require the use of iodine-containing supplements or iodised salt to increase BMIC to adequate levels for optimal infant nutrition.
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spelling pubmed-51330862016-12-11 Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia Jorgensen, Anita O’Leary, Peter James, Ian Skeaff, Sheila Sherriff, Jillian Nutrients Article Breast-fed infants may depend solely on an adequate supply of iodine in breast milk for the synthesis of thyroid hormones which are essential for optimal growth and cognitive development. This is the first study to measure breast milk iodine concentration (BMIC) among lactating women in Western Australian (n = 55). Breast milk samples were collected between 2014 and 2015 at a mean (±SD) of 38.5 (±5.5) days post-partum. The samples were analysed to determine median BMIC and the percentage of samples with a BMIC < 100 µg/L, a level considered adequate for breast-fed infants. The influence of (a) iodine-containing supplements and iodised salt use and (b) consumption of key iodine-containing foods on BMIC was also examined. The median (p25, p75) BMIC was 167 (99, 248) µg/L and 26% of samples had a BMIC < 100 µg/L. Overall, BMIC tended to be higher with iodine-containing supplement usage (ratio 1.33, 95% confidence interval (CI) (1.04, 1.70), p = 0.030), cow’s milk consumption (ratio 1.66, 95% CI (1.23, 2.23), p = 0.002) and lower for Caucasians (ratio 0.61, 95% CI (0.45, 0.83), p = 0.002), and those with secondary school only education (ratio 0.66, 95% CI (0.46, 0.96), p = 0.030). For most women, BMIC was adequate to meet the iodine requirements of their breast-fed infants. However, some women may require the use of iodine-containing supplements or iodised salt to increase BMIC to adequate levels for optimal infant nutrition. MDPI 2016-11-04 /pmc/articles/PMC5133086/ /pubmed/27827913 http://dx.doi.org/10.3390/nu8110699 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jorgensen, Anita
O’Leary, Peter
James, Ian
Skeaff, Sheila
Sherriff, Jillian
Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title_full Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title_fullStr Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title_full_unstemmed Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title_short Assessment of Breast Milk Iodine Concentrations in Lactating Women in Western Australia
title_sort assessment of breast milk iodine concentrations in lactating women in western australia
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5133086/
https://www.ncbi.nlm.nih.gov/pubmed/27827913
http://dx.doi.org/10.3390/nu8110699
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