Ferritin reflects your body’s iron stores and is the best single test for iron deficiency — the commonest cause of anaemia worldwide.
| Measure | Range |
|---|---|
| Ferritin (men) | 30–400 ng/mL |
| Ferritin (women) | 15–150 ng/mL |
| Serum iron | 60–170 µg/dL |
| Transferrin saturation | 20–50% |
It means your iron stores are low — the earliest sign of iron deficiency, often before anaemia appears. Causes include poor intake, heavy periods and gut blood loss.
Yes — ferritin also rises with inflammation or infection (it is an "acute-phase" marker), so a high value is interpreted alongside CRP and iron studies.
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