All lab markers

Iron status

sTfR

Rises when tissues are iron-starved, even if stored iron looks adequate. Higher results are the ones to watch.

In more detail

Rises when tissues are iron-starved, even if ferritin looks adequate.

What commonly moves it

  • Iron deficiencyLow stores or poor delivery limit red-cell production and thyroid conversion.

These are commonly described physiological relationships, shared for education. They are not a diagnosis and cannot account for your medications, history, or symptoms — discuss your results with a licensed clinician.

Watching sTfR over time?

Dose Compass charts each draw, flags meaningful moves, and helps you prepare questions for your clinician.

Start tracking