Nur Firdausiyah, S.A. 2026. Iron’s Contribution to Children’s Cognitive Development throughout the First 1000 Days of Life : A Literature Review: A Literature Review. Journal of Diverse Medical Research : Medicosphere. 3, 1 (Apr. 2026), 641–652. DOI:https://doi.org/10.33005/jdiversemedres.v3i1.284.