Which of the following laboratory tests is used to diagnose iron deficiency anemia by measuring the level of hepcidin in the blood?

A Serum ferritin
B Serum transferrin
C Serum hepcidin ✓
D Serum erythropoietin

Explanation

Hepcidin is a hormone that regulates iron metabolism, and its level can be measured in the blood to diagnose iron deficiency anemia.

Source

UpToDate: Iron Deficiency Anemia
Hematology Hematology: Anemia Hematology: Anemia Hard MEDICAL Confidence: medium