Cited by 373Iron Metabolism and DisordersNeurological diseases and metabolismTrace Elements in Health

Iron treatment normalizes cognitive functioning in young women

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Murray-Kolb, Laura E, Beard, John L·2007·The American Journal of Clinical Nutrition

Abstract

Background Evidence suggests that brain iron deficiency at any time in life may disrupt metabolic processes and subsequently change cognitive and behavioral functioning. Women of reproductive age are among those most vulnerable to iron deficiency and may be at high risk for cognitive alterations due to iron deficiency.Objective We aimed to examine the relation between iron status and cognitive abilities in young women.Design A blinded, placebo-controlled, stratified intervention study was conducted in women aged 18-35 y of varied iron status who were randomly assigned to receive iron supplements or a placebo. Cognition was assessed by using 8 cognitive performance tasks (from Detterman's Cognitive Abilities Test) at baseline (n = 149) and after 16 wk of treatment (n = 113).Results At baseline, the iron-sufficient women (n = 42) performed better on cognitive tasks (P = 0.011) and completed them faster (P = 0.038) than did the women with iron deficiency anemia (n = 34). Factors representing performance accuracy and the time needed to complete the tasks by the iron-deficient but nonanemic women (n = 73) were intermediate between the 2 extremes of iron status. After treatment, a significant improvement in serum ferritin was associated with a 5-7-fold improvement in cognitive performance, whereas a significant improvement in hemoglobin was related to improved speed in completing the cognitive tasks.Conclusions Iron status is a significant factor in cognitive performance in women of reproductive age. Severity of anemia primarily affects processing speed, and severity of iron deficiency affects accuracy of cognitive function over a broad range of tasks. Thus, the effects of iron deficiency on cognition are not limited to the developing brain.

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Research works printed but not linked: 5

  1. Beard JL, Connor JR. Iron status and neural functioning. Annu Rev Nutr 2003;23:41-58.
  2. Youdim MBH, Ben-Schachar D, Yehuda S. Putative biological mech- anisms on the effects of iron deficiency on brain metabolism. Am J Clin Nutr 1989;50:607-17.
  3. Detterman DK. CAT. Computerized cognitive abilities tests for research and teaching. Micro Psychol Network 1990;4:51-62.
  4. Detterman DK, Mayer JD, Caruso DR, Legree PJ, Conners FA, Taylor R. The assessment of basic cognitive abilities in relationship to cognitive deficit. Am J Ment Defic 1992;97:251-86.
  5. Murray-Kolb LE, Beard JL, Gilmore RO, Teti D, Perez E, Hendricks M. Maternal iron deficiency impacts mother/child interaction. FASEB J 2005;19:A1469 (abstr).

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Authors
Murray-Kolb, L. E., & Beard, J. L.
Affiliations
Pennsylvania State University (US)
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2007-03
Volume
85
Issue
3
Pages
778-787
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2101018822
Cited by
373
References
45
Citations by year
2026: 17 · 2025: 15 · 2024: 17 · 2023: 23 · 2022: 19 · 2021: 10 · 2020: 16 · 2019: 22 · 2018: 22 · 2017: 34 · 2016: 19 · 2015: 21 · 2014: 28 · 2013: 21 · 2012: 26
FWCI
9.73
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • UCLA - Biblioteca de Ciencias de la Salud (submittedVersion)
Funders
  • U.S. Department of Agriculture (99-35200-7610)
  • Deutsches Krebsforschungszentrum
  • National Center for Research Resources (MO1 RR10732, M01RR010732)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
Keywords
iron deficiency, iron supplementation, cognitive function, women of reproductive age, iron deficiency anemia, serum ferritin, hemoglobin, processing speed, cognitive accuracy
MeSH terms
Adolescent, Adult, Attention, Cognition, Female, Humans, Iron, Learning, Memory, Placebos, Reference Values, Patient Selection, Anemia, Iron-Deficiency

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