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Iron deficiency anemia or other forms of severe iron deficiency have consistently been shown to affect cognitive function in children from all parts of the world.1–4 The effect on IQ has been estimated as a decrease of 1.7 points for each 1.0g/dL decrease in hemoglobin.4
In this study, investigators from the University of Michigan; Oakland University, Rochester, Mich; and Hospital Nacional de Niños, San Jose, Costa Rica, evaluated long-term follow-up data on 185 individuals from a middle- and lower-class urban community in Costa Rica. These study participants had been the …
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