Observational studyActa obstetricia et gynecologica Scandinavica2021
Inadequate iodine intake in lactating women in Sweden: A pilot 1-year, prospective, observational study.
Observational study in Acta obstetricia et gynecologica Scandinavica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.
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Who cites it
13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 14 citations in OpenAlex.
- Do Postpartum Maternal Iodine Status or Supplementation Affect Thyroid Function After Delivery? A Systematic Review and Meta-Analysis.Biological trace element research · 2024Pooled it
- Breast Milk Iodine Concentration (BMIC) as a Biomarker of Iodine Status in Lactating Women and Children <2 Years of Age: A Systematic ReviewNutrients · 2022Pooled it
- Seaweed-Derived Iodine Intake During the Korean Postpartum Period: A 1-Year Follow-Up Study.Healthcare (Basel, Switzerland) · 2026Article
- Iodine concentrations in human milk after maternal high therapeutic potassium iodide dosing during breastfeeding: a contribution from the ConcePTION project.Therapeutic advances in endocrinology and metabolism · 2026Article
- Enhancing human milk iodine concentration: a data-driven action plan for Latvia.Frontiers in nutrition · 2025Article
- Food and nutrient intake at 1 year of age in Northern Sweden: results from the Swedish NICE birth cohort.Frontiers in nutrition · 2025Article
- Nutritional Status of Breastfeeding Mothers and Impact of Diet and Dietary Supplementation: A Narrative Review.Nutrients · 2024Review
- Infant iodine status and associations with maternal iodine nutrition, breast-feeding status and thyroid function.The British journal of nutrition · 2023Article
- Iodine: a scoping review for Nordic Nutrition Recommendations 2023.Food & nutrition research · 2023Article
- Prevalence of Hypothyroidism in Children and Adolescents of Fars Province (Southern Iran): A Nationwide Prescription Study, 2018-2019.Archives of Iranian medicine · 2022Article
- The Role of Iodine for Thyroid Function in Lactating Women and Infants.Endocrine reviews · 2022Review
- Inadequate iodine intake in lactating women in Sweden: A pilot 1-year, prospective, observational study.Acta obstetricia et gynecologica Scandinavica · 2021Observational
- Infant Iodine and Selenium Status in Relation to Maternal Status and Diet During Pregnancy and Lactation.Frontiers in nutrition · 2021Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionBreastfed infants depend on breast-milk iodine for growth and brain development, as iodine is a trace element important for thyroid hormone production. Iodine need is higher during lactation; hence, mothers and children are at risk of iodine deficiency. We aimed to explore maternal iodine and thyroidal status during lactation. MATERIAL AND
methodsPregnant women were recruited in Gothenburg, southwest Sweden. Maternal urine and serum were collected at pregnancy week 35-37 (n = 84) and 0.5, 4, and 12 months postpartum. Seventy mothers provided breast milk at 0.5 months.
resultsMedian (interquartile range) breast-milk iodine concentration was 90 (66-116) μg/L. About 58% had breast-milk iodine concentration <100 μg/L. Iodine supplement users (n = 13) had higher breast-milk iodine concentration than non-users (n = 49) (140 μg/L vs 71 μg/L, P = .001). Exclusively breastfeeding women at 4 months postpartum (n = 57) had lower median urinary iodine concentration (85 μg/L vs 133 μg/L, P = .004) and higher thyroglobulin serum concentration (22.3 μg/L vs 11.8 μg/L, P = .032) than non-exclusively breastfeeding women (n = 25). Concentrations of thyroid hormones were unaffected.
conclusionsThis pilot study suggests that lactating women in southwest Sweden present mildly inadequate iodine intake, mainly among non-iodine supplement users and exclusively breastfeeding mothers. Studies on the coverage of the iodine fortification program in breastfeeding women are warranted.
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