The ratio of iron to ferritin, a marker of iron status.
The iron to ferritin ratio is a calculated value, not a separate blood test. It compares serum iron, the iron circulating in your blood right now, with ferritin, which reflects your stored iron.
The formula is: serum iron ÷ ferritin, using the units reported by the lab.
Iron in the blood and iron in storage tell different parts of the same story. Comparing them can give a quick sense of how circulating iron relates to reserves, though it is a rough indicator rather than a standard clinical test.
The pattern is read alongside a full set of iron studies. On its own this ratio is not a well-validated clinical marker, so it is best used as supporting context.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
There is no established reference range for the iron to ferritin ratio, and it is not a standard clinical test. It should be interpreted only as supporting context within a complete iron study, not against a fixed cutoff.
Serum iron varies through the day and rises after iron-containing food or supplements, so timing matters. Ferritin rises with inflammation, infection and liver disease regardless of true iron stores. These swings make the ratio unstable and limit its usefulness on its own.
Read with its components, serum iron and ferritin, and alongside transferrin, transferrin saturation and a full blood count.
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