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Correlation Between Drinking Water and Iodine Status: a Systematic Review and Meta-analysis

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Abstract

Iodine is a micronutrient essential for maintaining normal body functioning, and the consumption depends on the distribution in the environment, and insufficient or excessive intake results in thyroid dysfunction. The purpose of this review was to evaluate the correlation between iodine concentration in drinking water and the iodine status of the population. The systematic review was conducted following the PRISMA guidelines and was registered at the International Prospective Register of Ongoing Systematic Reviews (CRD42019128308). A literature search was conducted using MEDLINE/PUBMED (National Library of Medicine), LILACS (Latin-American and Caribbean Literature on Health Sciences), and Cochrane Library, June 2021. The quality of the studies was assessed by a checklist for cross-sectional studies developed by Joanna Briggs Institute. The initial search identified 121 articles, out of which ten were included in this systematic review, and five were included in the meta-analysis. Among the articles listed, six adopted cutoff points to classify the iodine content in the drinking water. The study identified median iodine concentration in drinking water from 2.2 to 617.8 μg/L and the correlation between iodine concentration in drinking water and urinary iodine concentration was 0.92, according to meta-analysis. Furthermore, the iodine status was correlated to the iodine content in water. The determination of a cutoff point can contribute to the implementation of iodine consumption control measures.

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Funding

We would like to thank the Coordination of Improvement of Higher Education Personnel—Brazil (CAPES)—Financing Code 001. National Council for Scientific and Technological Development (CNPq), case 408295/2017–1. Foundation of Support and Research of the State of Minas Gerais (FAPEMIG) case APQ-03336–18.

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Authors and Affiliations

  1. Departamento de Nutrição E Saúde, Universidade Federal de Viçosa (UFV), Ed. Centro de Ciências Biológicas II Avenida Peter Henry Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil

    Francilene Maria Azevedo, Almeida Abudo Leite Machamba, Aline Carare Candido, Carina Aparecida Pinto, Sílvia Oliveira Lopes, Mariana de Souza Macedo, Sarah Aparecida Vieira Ribeiro, Silvia Eloiza Priore & Sylvia do Carmo Castro Franceschini

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  1. Francilene Maria Azevedo
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  2. Almeida Abudo Leite Machamba
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  3. Aline Carare Candido
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  4. Carina Aparecida Pinto
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  5. Sílvia Oliveira Lopes
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Correspondence to Francilene Maria Azevedo.

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Azevedo, F.M., Machamba, A.A.L., Candido, A.C. et al. Correlation Between Drinking Water and Iodine Status: a Systematic Review and Meta-analysis. Biol Trace Elem Res 201, 129–138 (2023). https://doi.org/10.1007/s12011-022-03127-4

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  • DOI: https://doi.org/10.1007/s12011-022-03127-4

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