Iron Sufficiency in Breast-Fed Infants and the Availability of Iron From Human Milk

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Abstract
Four infants were studied who had been exclusively breast-fed for periods varying from 8 to 18 months. All had grown sufficiently to have exhausted their prenatally acquired iron endowment with respect to meeting current needs for maintaining normal hemoglobin levels. All infants had normal hemoglobin values and normal serum iron values. Studies of iron absorption from breast milk and cow's milk were performed in ten normal adults. The absorption of iron from the human milk was significantly higher. These findings suggest that the iron present in human milk is sufficient to meet the iron requirements of the exclusively breast-fed infant until he approximately triples his birthweight.