Serum iron measures the iron circulating in your blood, bound to the transport protein transferrin.
- Normal range (adults)
- Men 60–170 µg/dL (10.7–30 µmol/L) · Women 50–150 µg/dL (9–27 µmol/L)
- Sample
- Blood
- Fasting
- A morning, fasting sample is preferred because iron levels change during the day.
- Also called
- Iron, S.Iron, Fe, Serum Fe, Blood Iron, Iron Serum
Serum Iron normal range
| Group | µg/dLConventional units: US, South Asia | µmol/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Men | 60–170 | 10.7–30 |
| Women | 50–150 | 9–27 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Serum Iron test done?
It is part of iron studies, used to diagnose iron deficiency or iron overload. It changes during the day, so it is read together with ferritin and TIBC.
What does a high Serum Iron level mean?
High serum iron can mean iron overload, or simply a recent iron-rich meal or supplement.
Common causes
- Iron supplements or injections
- Hemochromatosis (inherited iron overload)
- Repeated blood transfusions
- Liver disease
Diet and lifestyle tips
- Stop iron supplements unless prescribed
- Avoid vitamin C supplements with meals
- Limit red meat and iron-fortified foods if overload is confirmed
- Avoid alcohol
What does a low Serum Iron level mean?
Low serum iron usually means iron deficiency, but can also be due to inflammation.
Common causes
- Low iron intake
- Heavy periods or blood loss
- Pregnancy
- Poor absorption
- Chronic inflammation
Diet and lifestyle tips
- Iron-rich foods with vitamin C
- No tea or coffee with meals
- Take iron supplements only as advised
When should you see a doctor?
Have serum iron interpreted with ferritin and TIBC by your doctor.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.