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ArticleNature medicine2025

Global, regional and national burden of dietary iron deficiency from 1990 to 2021: a Global Burden of Disease study.

Sooji Lee, Yejun Son, Jiyoung Hwang, Min Seo Kim, GBD 2021 Dietary Iron Deficiency Collaborators, Jae Il Shin, Dong Keon Yon, Nicholas J Kassebaum

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Article in Nature medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

38 citing papers in PubMed.

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  10. Temporal trends and patterns in neonatal sepsis mortality across 194 countries, 2000-2021, with projections up to 2050.Journal of perinatology : official journal of the California Perinatal Association · 2026
    Article
  11. Discovery of Iron-Chelating Peptides fromFoods (Basel, Switzerland) · 2026
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Sooji Lee *Department of Medicine, Kyung Hee University College of Medicine, Seoul, South Korea.
Yejun Son *Department of Precision Medicine, Kyung Hee University College of Medicine, Seoul, South Korea.
Jiyoung Hwang *Center for Digital Health, Medical Science Research Institute, Kyung Hee University College of Medicine, Seoul, South Korea.
Min Seo Kim *Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA, USA.ORCID http://orcid.org/0000-0003-2115-7835
GBD 2021 Dietary Iron Deficiency Collaborators
Jae Il ShinDepartment of Pediatrics, Yonsei University College of Medicine, Seoul, South Korea. shinji@yuhs.ac.ORCID http://orcid.org/0000-0003-2326-1820
Dong Keon YonDepartment of Pediatrics, Kyung Hee University, Seoul, South Korea. yonkkang@gmail.com.ORCID http://orcid.org/0000-0003-1628-9948
Nicholas J KassebaumInstitute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.ORCID http://orcid.org/0000-0002-4299-9348

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although iron deficiency is well documented, less is known about dietary involvement in symptomatic iron deficiency manifesting in medical conditions. In this study, we quantified the global burden of dietary iron deficiency, focusing on where inadequate dietary iron intake leads to clinical manifestations such as anemia. We analyzed data from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021 to estimate dietary iron deficiency prevalence and disability-adjusted life years (DALYs), stratified by age, sex, geography and socio-demographic index (SDI) across 204 countries. In 2021, global age-standardized prevalence and DALY rates were 16,434.4 (95% uncertainty interval (UI), 16,186.2-16,689.0) and 423.7 (285.3-610.8) per 100,000 population, with rates decreasing by 9.8% (8.1-11.3) and 18.2% (15.4-21.1) from 1990 to 2021. A higher burden was observed in female individual (age-standardized prevalence, 21,334.8 (95% UI, 20,984.8-21,697.4); DALYs, 598.0 (402.6-854.4)) than in male individual ((age-standardized prevalence, 11,684.7 (11,374.6-12,008.8); DALYs, 253.0 (167.3-371.0)). High-SDI countries presented greater improvement, with a 25.7% reduction compared to 11.5% in low-SDI countries. Despite global improvements, dietary iron deficiency remains a major health concern with a global prevalence of 16.7%, particularly affecting female individuals, children and residents in low-SDI countries. Urgent interventions through supplementation, food security measures and fortification initiatives are essential.

Indexed as

Anemia, Iron-DeficiencyGlobal Burden of DiseaseIron DeficienciesIron, DietaryAdolescentAdultAgedChildChild, PreschoolDisability-Adjusted Life YearsFemaleGlobal HealthHumansInfantMaleMiddle AgedIron, Dietary

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.