Individual test · Labcorp 143305

Soluble Transferrin Receptor

This test measures a protein in your blood that rises when your cells need more iron. It helps show whether you have a true iron deficiency, which is especially helpful if you have other long-term health conditions that make standard iron tests difficult to interpret. By looking at this level, doctors can better distinguish between anemia caused by a lack of iron and anemia caused by chronic inflammation. However, this test does not identify the specific cause of the inflammation or the source of iron loss.