The article “Iron Deficiency in Children With Attention-Deficit/Hyperactivity Disorder [ADHD]”1 reported abnormally low ferritin levels in children with ADHD compared with a group of age- and sex-matched children with mild reading disability but no ADHD. All subjects—both study group and controls—had normal values for serum iron and hemoglobin concentration and were medication free (including psychostimulants) for at least 2 months prior to the study. Children with self-imposed dietary restrictions (including micronutrient deficiency), poor growth (secondary to inadequate nutrition), or with some evident signs of malnutrition were not included in this study. Above all, analysis of item 40 (eating disorder) from Conners’ Parent Rating Scale revealed no differences between children with low and normal ferritin levels.
Konofal E. Is Iron Deficiency Causative of Attention-Deficit/Hyperactivity Disorder?—Reply. Arch Pediatr Adolesc Med. 2005;159(8):787–788. doi:10.1001/archpedi.159.8.788-b
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