Sahadewa, Sukma (2025) The Influence of Zinc Supplementation on Improving Learning Concentration and Hemoglobin Levels in Anemic Adolescent Girls at Junior High School. Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram, 13 (3). pp. 796-809. ISSN 2540-7899
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Abstract
Mild to moderate anemia impairs cognitive performance and academic engagement among adolescent girls, yet school-based nutrition programs in Indonesia focus largely on iron and vitamin A. This study evaluated whether a focused 30-day regimen of 20 mg/day zinc could improve both hemoglobin concentration and attention, as measured by the Stroop Color–Word Test, in 30 junior high school girls with baseline hemoglobin < 12 g/dL. Following daily supplementation, mean hemoglobin rose from 10.6 ± 0.5 g/dL to 12.4 ± 0.4 g/dL (Δ = 1.8 g/dL, p < 0.001, Cohen’s d = 3.86), fully eliminating moderate anemia in this cohort. Stroop scores increased from 61.2 ± 5.3 to 75.8 ± 4.6 points (Δ = 14.6, p < 0.001, Cohen’s d = 2.88), with no students remaining in the lowest concentration category post-intervention. These parallel gains reflect zinc’s dual role in enhancing erythropoiesis improving cerebral oxygen delivery and modulating neurotransmission via NMDA/GABA balance and BDNF upregulation. Effect sizes exceed those typically reported for iron-only or broader micronutrient interventions. Findings support integrating a one-month zinc supplement into Indonesian school-health protocols to rapidly correct anemia and bolster cognitive readiness for learning. Keywords: Zinc Supplementation; Adolescent Anemia; Hemoglobin; Stroop Color Word Test; Cognitive Concentration
Item Type: | Article |
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Uncontrolled Keywords: | Zinc Supplementation; Adolescent Anemia; Hemoglobin; Stroop Color Word Test; Cognitive Concentration |
Subjects: | R Medicine > R Medicine (General) |
Divisions: | Faculty of Medicine > Medicine Study Program |
Depositing User: | Sulimin BP3 |
Date Deposited: | 09 Oct 2025 03:03 |
Last Modified: | 09 Oct 2025 03:03 |
URI: | http://erepository.uwks.ac.id/id/eprint/21612 |
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