What Serum Iron tells you
Red and white blood cell markers relating to oxygen transport, immune cells, and iron status. They form part of a routine blood picture interpreted by a clinician.
Which Honed panels include Serum Iron
Serum Iron is measured in the Essential Panel and Performance Panel. Every sample is collected at a pathology collection centre and processed at a NATA-accredited laboratory against RCPA reference ranges, with personalised plain-English commentary in your secure online report.
Why Serum Iron matters
Serum iron is the amount of iron circulating in the blood, bound to transferrin (the iron transport protein). Serum iron varies throughout the day and with meals; fasting morning testing is standard. Serum iron is best interpreted alongside ferritin, transferrin saturation, and total iron-binding capacity to assess iron status. In athletes, serum iron is one component of assessing iron availability for hemoglobin synthesis and aerobic performance.
The range explained
Low levels
Low serum iron (below 7 µmol/L) indicates depleted circulating iron, which impairs hemoglobin synthesis and oxygen transport.
Normal range
Reference range: 7–32 µmol/L. This represents adequate circulating iron for hemoglobin synthesis.
High levels
Elevated serum iron (above 32 µmol/L) can indicate iron overload from supplementation or genetic iron overload conditions.
What affects Serum Iron
- Training: Endurance training increases iron utilization and can lower serum iron.
- Nutrition: Red meat, legumes, and fortified grains provide dietary iron. Vitamin C enhances iron absorption; tea and coffee inhibit it.
- Sleep: Sleep supports iron-dependent processes.
- Stress: Chronic stress can affect iron metabolism.
When to retest
Every 8–12 weeks for endurance athletes with low iron; every 12 months for general health.
Why athletes care
Endurance athletes closely monitor serum iron alongside ferritin and transferrin saturation to ensure adequate iron for hemoglobin synthesis and aerobic performance.
Related haematology markers
FAQ
What does the Serum Iron blood test measure?
The amount of iron circulating in the blood, interpreted alongside ferritin and transferrin saturation to build a complete picture of iron status.
Which Honed Health panels include Serum Iron?
Serum Iron is included in the Essential and Performance panels.
What unit is Serum Iron measured in?
Serum Iron is reported in µmol/L, measured at NATA-accredited laboratories against RCPA reference ranges, with personalised plain-English commentary in your secure report.