Serum Iron (FE)

Iron circulating bound to transferrin. Diurnal — highest in the morning.

Units

µg/dL

Reference (Male)

65 – 175 µg/dL

Reference (Female)

50 – 170 µg/dL

What it measures

Iron circulating bound to transferrin. Diurnal — highest in the morning.

What a high value can mean

Hemochromatosis, frequent transfusions, supplementation.

What a low value can mean

Iron-deficiency anemia, chronic blood loss, malabsorption.

Conditions it helps assess

Iron status

Reading these numbers in context

Reference ranges describe the central 95 % of a healthy reference population — 5 % of perfectly healthy people fall outside any given range by definition. A single mildly abnormal value is rarely meaningful on its own. blood-test.life always interprets values together with related biomarkers before flagging.

Related biomarkers in Iron Studies

Ferritin FER Storage form of iron. The single most useful marker for iron deficiency, with caveats in inflammation. Transferrin Saturation TSAT Percentage of transferrin bound to iron. Best single marker for hereditary hemochromatosis screening.