# 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.

- Labcorp code: 143305
- Category: [Nutrients](https://app.picardo.health/labs/tests/nutrients.md)
- Price: shown at checkout, before payment.
- Blood draw: free at a Labcorp location, or $75.00 at home.
- Order link: https://app.picardo.health/labs/order?tests=143305&ref=assistant

## About ordering

A licensed physician reviews every order before any test is run, and results arrive in the person's Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.