Low-Dose Iron Supplementation in Infancy Modestly Increases Infant Iron Status at 9 Mo without Decreasing Growth or Increasing Illness in a Randomized Clinical Trial in Rural China.

Background: Previous trials of iron supplementation in infancy did not consider maternal iron supplementation.

Objective: This study assessed effects of iron supplementation in infancy and/or pregnancy on infant iron status, illnesses, and growth at 9 mo.

Methods: Enrollment occurred from December 2009 to June 2012 in Hebei, China.