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Transferrin is the primary iron transport protein in your blood, shuttling iron from your gut and storage sites to bone marrow for red blood cell production. Your liver regulates transferrin production inversely to iron stores, making it a stable indicator of iron status. High transferrin with low iron saturation is the classic pattern of iron deficiency anemia.
Also known as: Transferrin, Transferrina, Transferrine, Trf, 트랜스페린, 转铁蛋白
High transferrin indicates iron deficiency, pregnancy, or estrogen therapy. Low transferrin occurs in iron overload, chronic inflammation, or liver disease.
Standard range is 200-360 mg/dL. Functional targets are 225-300 mg/dL. Transferrin above 300 mg/dL often indicates early iron depletion.