Definition
What Serum Iron measures
Serum iron measures the iron traveling through blood bound to transferrin at the moment of collection. It swings with meals, time of day, and recent supplements.
← All biomarkers
Nutrient statusEssentialCompleteug/dL
Serum Iron
Iron in transit at the moment of the draw
Illustrative sample band · Synthetic
88ug/dL
28Sample target 60–150 ug/dL179
Why it matters
How clinicians usually read it
Alone it is noisy; with TIBC and saturation it becomes the standard iron-studies set that separates deficiency, overload, and inflammation effects.
When it reads low
A lower value can mean
A low serum iron can reflect true deficiency or the body sequestering iron during inflammation. Ferritin and saturation sort the two.
When it reads high
A higher value can mean
A high serum iron can follow a recent supplement dose or, less commonly, an overload condition. Repeat fasting values and saturation add clarity.
Questions for a clinician
Bring the number into a real conversation
01
Did I take an iron supplement in the day before this draw?
02
How do my ferritin and saturation frame this value?
03
Is a fasting morning repeat worth doing before conclusions?
Educational boundary
Educational information only. Displayed ranges are illustrative sample bands, not a diagnosis, treatment plan, or substitute for the contracted laboratory report and a qualified clinician.
See it as a sample result
The sample dashboard shows an illustrative reading, target band, and trend for Serum Iron.