Transferrin
Stomach and gut healthTransferrin is a liver-produced protein that transports iron in the blood to various tissues.
It binds and carries iron to where it's needed.
Why this matters
Transferrin levels reveal how effectively your body transports and utilizes iron. Low transferrin can indicate malnutrition, liver disease, or chronic illness, while high levels may suggest iron deficiency. Combining transferrin with iron levels helps distinguish true iron deficiency from functional deficiency, where iron is present but unavailable due to inflammation. Maintaining balanced iron intake and overall nutritional health supports proper oxygen delivery and energy metabolism.
How this connects to other biomarkers
- Elevated Transferrin with low Ferritin and low Transferrin Saturation is the body's compensatory response to iron deficiency — it makes more carrier protein to grab whatever iron is available.
- Low Transferrin alongside low Albumin suggests protein malnutrition or chronic disease.
- In iron overload (hemochromatosis), Transferrin is typically normal or low while Ferritin and Transferrin Saturation are markedly elevated.
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