Definition
What Iron Saturation measures
Transferrin (iron) saturation is serum iron divided by total iron-binding capacity, expressed as a percentage. It shows how loaded the transport system actually is.
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Nutrient statusEssentialComplete%
Iron Saturation
How full the iron-transport system is
Illustrative sample band · Synthetic
28%
12Sample target 20–45 %58
Why it matters
How clinicians usually read it
It is the ratio that catches what single values miss: persistently high saturation is a primary screen for hereditary iron overload, and low saturation supports true deficiency.
When it reads low
A lower value can mean
A low saturation supports iron deficiency or iron being withheld during inflammation. Ferritin and hs-CRP on this panel complete the picture.
When it reads high
A higher value can mean
A persistently high saturation is a reason to discuss hereditary hemochromatosis screening with a clinician, especially with any family history.
Questions for a clinician
Bring the number into a real conversation
01
Is my saturation consistent across draws, or was this a one-off?
02
At what level would you order genetic or follow-up testing?
03
Do my ferritin and hs-CRP agree with this saturation story?
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 Iron Saturation.