Why does the American Academy of Pediatrics recommend iron fortified formula or supplemental iron starting at 4-8 weeks?

• A. Growth and erythropoiesis accelerate early, increasing iron needs
• B. Growth and erythropoiesis slow soon after birth, iron requirements are lower and an exogenous source of 2-4 mg/kg/day is recommended during stable growth
• C. Iron requirements are fixed regardless of growth
• D. Only infants with anemia require iron supplementation

Answer: (B)