Opin vísindi

Iodine status of breastfed infants and their mothers' breast milk iodine concentration

Iodine status of breastfed infants and their mothers' breast milk iodine concentration


Title: Iodine status of breastfed infants and their mothers' breast milk iodine concentration
Author: Petersen, Erna
Thorisdottir, Birna   orcid.org/0000-0001-7320-0116
Thorsdottir , Inga   orcid.org/0000-0002-2946-287X
Gunnlaugsson, Geir   orcid.org/0000-0002-6674-2862
Arohonka, Petra
Erlund, Iris   orcid.org/0000-0002-0083-1256
Gunnarsdottir, Ingibjorg   orcid.org/0000-0001-9447-8627
Date: 2020-03-11
Language: English
Scope: e12993
University/Institute: Háskóli Íslands
University of Iceland
School: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Félagsvísindasvið (HÍ)
School of Social Sciences (UI)
Department: Matvæla- og næringarfræðideild (HÍ)
Faculty of Food Science and Nutrition (UI)
Félagsfræði-, mannfræði- og þjóðfræðideild (HÍ)
Faculty of Sociology, Anthropology and Folkloristics (UI)
Series: Maternal & Child Nutrition;16(3)
ISSN: 1740-8695
1740-8709 (eISSN)
DOI: 10.1111/mcn.12993
Subject: Diet; Human; Infant; Iodine; Lactation; Milk; Mataræði; Brjóstagjöf; Joð
URI: https://hdl.handle.net/20.500.11815/2313

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Citation:

Petersen, E., Thorisdottir, B., Thorsdottir, I., Gunnlaugsson, G., Arohonka, P., Erlund, I., Gunnarsdottir, I., 2020. Iodine status of breastfed infants and their mothers' breast milk iodine concentration. Maternal & Child Nutrition. doi:10.1111/mcn.12993

Abstract:

Iodine is an essential nutrient for growth and development during infancy. Data on iodine status of exclusively (EBF) and partially breastfed (PBF) infants as well as breast milk iodine concentration (BMIC) are scarce. We aimed to assess (a) infant iodine nutrition at the age of 5.5 months by measuring urinary iodine concentration (UIC) in EBF (n = 32) and PBF (n = 28) infants and (b) mothers' breast milk iodine concentration (n = 57). Sixty mother–infant pairs from three primary health care centres in Reykjavik and vicinities provided urine and breast milk samples for iodine analysis and information on mothers' habitual diet. The mother–infant pairs were participants of the IceAge2 study, which focuses on factors contributing to infant growth and development, including body composition and breast-milk energy content. The median (25th–75th percentiles) UIC was 152 (79–239) μg/L, with no significant difference between EBF and PBF infants. The estimated median iodine intake ranged from 52 to 86 μg/day, based on urinary data (assuming an average urine volume of 300–500 ml/day and UIC from the present study). The median (25th–75th percentiles) BMIC was 84 (48–114) μg/L. It is difficult to conclude whether iodine status is adequate in the present study, as no ranges for median UIC reflecting optimal iodine nutrition exist for infants. However, the results add important information to the relatively sparse literature on UIC, BMIC, and iodine intake of breastfed infants.

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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