Iron and ADHD: time to move beyond serum ferritin levels

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Renato Donfrancesco1, Pasquale Parisi, Nicola Vanacore

  • 11S. Pertini Hospital, ASL RM/B, Rome, Italy.

Journal of Attention Disorders
|February 1, 2012
PubMed

Insights

This study found no significant difference in serum ferritin levels between children with Attention-Deficit/Hyperactivity Disorder (ADHD) and controls. Ferritin levels were not associated with ADHD symptom severity, subtypes, or IQ in this large, controlled investigation.

Area of Science:

  • Neuroscience
  • Pediatrics
  • Biochemistry

Background:

  • Attention-Deficit/Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder.
  • Iron deficiency has been hypothesized to play a role in ADHD pathophysiology.
  • Previous studies on iron status and ADHD have yielded inconsistent results.

Purpose of the Study:

  • To compare serum ferritin levels in stimulant-naïve children diagnosed with ADHD versus healthy controls.
  • To investigate the association between serum ferritin levels and ADHD symptom severity, ADHD subtypes, and intelligence quotient (IQ).

Main Methods:

  • Serum ferritin levels were measured using the enzyme-linked immunosorbent assay (ELISA) method.
  • The study included 101 children with ADHD and 93 matched controls, all treatment-naïve.
  • Statistical analyses were performed to compare groups and assess correlations.

Main Results:

  • No significant differences in serum ferritin levels were observed between children with ADHD and the control group.
  • Serum ferritin levels did not significantly differ among the ADHD subtypes.
  • No significant correlations were found between serum ferritin levels and measures of ADHD symptom severity or IQ.

Conclusions:

  • This large, controlled study does not support a significant relationship between peripheral serum ferritin levels and ADHD in stimulant-naïve children.
  • The findings do not exclude a potential role for brain iron deficiency in ADHD, warranting further investigation.
  • Further research may explore central nervous system iron markers or different iron-related biomarkers.
Abstract

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