Reticulocyte haemoglobin equivalent (RET-He) as an early marker of responsiveness to oral iron supplementation.

Single timepoint RET-He measures have poor predictive ability; however, change in RET-He after 1 week was a strong predictor of haemoglobin response among Cambodian women receiving 60 mg elemental iron and can be measured easily and quickly after only 1 week of iron therapy.