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A ferritin serum blood test is a type of test that measures the levels of ferritin in the blood. Ferritin is a protein that is used by the body to store iron, which is an essential mineral that is necessary for many important functions, such as carrying oxygen in the blood and supporting the immune system. This test is commonly ordered to help diagnose and monitor iron deficiency and iron overload, which are two common disorders that can affect the levels of ferritin in the blood.
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