Why Not Give Iron Supplements to Every Baby?

The iron in breastmilk is bound to proteins which make it available to the baby only, thus preventing potentially harmful bacteria (like E.coli, Salmonella, Clostridium, Bacteroides, Escherichia, Staphylococcus) from using it. These two specialized proteins in breastmilk (lactoferrin and transferrin) pick up and bind iron from baby's intestinal tract. By binding this iron, they

1. stop harmful bacteria from multiplying by depriving them of the iron they need to live and grow, and
2. ensure that baby (not the bacteria) gets the available iron.

Supplemental iron (particularly when administered in solution or as a separate supplement rather than incorporated into a meal) can interfere with zinc absorption. In addition, iron supplements and iron-fortified foods can sometimes cause digestive upsets in babies.

A recent study (Dewey 2002) found that routine iron supplementation of breastfed babies with normal hemoglobin levels may present risks to the infant, including slower growth (length and head circumference) and increased risk of diarrhea.

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