Limited evidence suggested that iron supplementation produced a small improvement in cognitive development but had no effect on physical growth .
CONCLUSIONS : In 2 to 5 year olds , daily iron supplementation increases hemoglobin and ferritin .
There is a concerning lack of data on the effect of iron supplementation on clinical ly important outcomes including anemia , ID anemia , ID , and cognitive development .
BACKGROUND AND OBJECTIVES : Iron deficiency ( ID ) is the most common cause of anemia worldwide .
The prevalence is highest among preschool-aged children .
Iron is widely administered to children with or at risk for ID , but evidence of benefit among 2- to 5-year-old children has not been evaluated by systematic review .
We summarize the evidence for the benefit and safety of daily iron supplementation with regard to hematologic , growth , and cognitive parameters in 2 to 5 year olds .
Iron, but not folic acid, combined with effective antimalarial therapy promotes haematological recovery in African children after acute falciparum malaria.
Whether children with malarial anaemia should receive supplementation with iron or folic acid is uncertain . Therefore , the effects of supplementary treatment with iron or folic acid , given together with chloroquine or pyrimethamine-sulfadoxine ( Fansidar ) , has been assessed in 600 Gambian children with uncomplicated falciparum malaria . After one month , haematological recovery was significantly better in the group treated with Fansidar than in the chloroquine-treated group ( difference in mean haemoglobin level = 0.54 g/dL , P = 0.01 ) . Children who received  iron had a significantly better response than those given placebo ( differences in mean haemoglobin level after one month and at dry season follow-up = 0.70 g/dL , P = 0.006 , and 0.81 g/dL , P = 0.001 , respectively ) . Iron supplementation was not associated with increased prevalence of malaria . Supplementation with folic acid did not improve the haematological response but , among children who received Fansidar , the treatment failure rate was significantly higher among those given folic acid than among those given placebo . Thus , supplementation with iron , but not folic acid , improves haematological recovery without increasing susceptibility to malaria
Limited evidence suggested that iron supplementation produced a small improvement in cognitive development but had no effect on physical growth .
CONCLUSIONS : In 2 to 5 year olds , daily iron supplementation increases hemoglobin and ferritin .
There is a concerning lack of data on the effect of iron supplementation on clinical ly important outcomes including anemia , ID anemia , ID , and cognitive development .
BACKGROUND AND OBJECTIVES : Iron deficiency ( ID ) is the most common cause of anemia worldwide .
The prevalence is highest among preschool-aged children .
Iron is widely administered to children with or at risk for ID , but evidence of benefit among 2- to 5-year-old children has not been evaluated by systematic review .
We summarize the evidence for the benefit and safety of daily iron supplementation with regard to hematologic , growth , and cognitive parameters in 2 to 5 year olds .