Iron supplementation improves mental development score modestly .
This effect is particularly apparent for intelligence tests above 7 years of age and in initially anaemic or iron-deficient anaemic subjects .
There is no convincing evidence that iron treatment has an effect on mental development in children below 27 months of age or on motor development
OBJECTIVE To evaluate the effect of iron supplementation on  mental and motor development in children through a systematic review of r and omised controlled trials ( RCTs ) .
Preliminary findings on iron supplementation and learning achievement of rural Indonesian children.
The effects of oral iron supplementation on blood iron levels and learning achievement in 130 rural Indonesian school children were assessed in this double-blind study . The children were classified into anemic and nonanemic groups according to their initial hemoglobin and transferrin saturation levels and were r and omly assigned to either iron or placebo treatment for 3 mo . Hematological , anthropometric , and learning-achievement data were collected before ( T1 ) and after ( T2 ) the treatment period and 3 mo later . The means and st and ard deviations suggest that supplementation with 10 mg ferrous sulfate per kilogram body weight per day for 3 mo result ed in an apparent improvement in anemic subjects ' hematological status and learning-achievement scores . No tests of statistical comparisons are reported
Iron supplementation improves mental development score modestly .
This effect is particularly apparent for intelligence tests above 7 years of age and in initially anaemic or iron-deficient anaemic subjects .
There is no convincing evidence that iron treatment has an effect on mental development in children below 27 months of age or on motor development
OBJECTIVE To evaluate the effect of iron supplementation on  mental and motor development in children through a systematic review of r and omised controlled trials ( RCTs ) .