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At what age does iron supplementation become necessary in low-birth-weight infants?
Insights
Preventing iron deficiency in low-birth-weight infants is crucial. Early iron supplementation, starting at two weeks, effectively prevents iron deficiency without excess iron stores.
Area of Science:
- Neonatal nutrition
- Pediatric hematology
Background:
- Iron deficiency is a significant concern for low-birth-weight infants.
- Neonatal iron stores are limited and can be rapidly depleted.
- Timely iron supplementation is essential for preventing iron deficiency anemia.
Purpose of the Study:
- To determine the optimal timing for iron supplementation in low-birth-weight infants.
- To assess the efficacy of a specific iron dosage in preventing iron deficiency.
- To evaluate iron status markers in relation to supplementation protocols.
Main Methods:
- A cohort of 117 low-birth-weight infants (1,000-2,000 gm) was studied from 0.5 to 6 months.
- Infants received either 2 mg iron/kg/day starting at 0.5 months or no supplemental iron (control).
- Hemoglobin, mean corpuscular volume, serum iron/iron-binding capacity, and serum ferritin were measured.
Main Results:
- Infants not receiving supplemental iron showed signs of iron deficiency by three months of age.
- A daily dose of 2 mg iron/kg/day initiated at two weeks of age effectively prevented iron deficiency.
- This dosage did not lead to iron overload in the studied infants.
Conclusions:
- Early iron supplementation is vital for low-birth-weight infants to prevent depletion of iron stores.
- A prophylactic dose of 2 mg iron/kg/day started at two weeks of age is safe and effective.
- This regimen ensures adequate iron status throughout the critical early months of life.
Abstract:
Prevention of iron deficiency in low-birth-weight infants requires iron supplementation before neonatal iron stores are exhausted. In order to accurately determine when this depletion occurs, we measured the hemoglobin, mean corpuscular volume, serum iron/iron-binding capacity, and serum ferritin in 117 low-birth-weight infants (1,000 to 2,000 gm) from 0.5 until 6 months of age. All infants received banked breast milk in the hospital and breast milk or cow milk formula later; those with odd birth dates received 2 mg iron as ferrous sulfate/kg/day starting at 0.5 months; those with even birth dates received no additional iron unless they developed anemia. The results indicate that low-birth-weight infants who receive no supplemental iron may develop iron deficiency by three months of age and that a dose of iron of 2 mg/kg/day started at two weeks of age prevents iron deficiency without providing excess.