What is Iron?
iron currently moving in your blood
Serum iron measures how much iron is currently being transported in the blood. It varies through the day and is interpreted with transferrin and ferritin.
Iron in the blood is bound to transferrin and represents only a small fraction of the body's total iron. A single value can be misleading - ferritin is the more reliable measure of iron status.
Test facts
- Unit
- µmol/L
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 2 days
What does low Iron mean?
Low iron can reflect iron deficiency but also appears during acute inflammation.
What does high Iron mean?
High iron can appear in haemochromatosis or after iron supplementation.
Panels that measure Iron
- Deep Baseline
- Female Annual
- Male Annual
- Iron & Anaemia
More markers in the same area
Launching in Stockholm in 2026.
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: May 2026.