Which test would be used to assess iron stores?

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When evaluating how much iron is stored in the body, you want a measure that reflects stored iron rather than just what's circulating. Ferritin, the protein that stores iron, serves as the best indicator of total body iron stores. Serum ferritin levels correlate with stored iron, and ferritin is typically measured as part of a serum iron studies panel. This panel may also include other iron-related parameters (like serum iron and TIBC) to help interpret iron status.

The other tests are not about iron stores: a lipid panel checks fats in the blood, a thyroid panel assesses thyroid hormone function, and a liver function panel evaluates liver health—none specifically quantify iron reserves.