{"id":"transferrin","name":"Transferrin","shortName":"Transferrin","aliases":["Transferrin, Serum","Serum Transferrin","Transferrin Level","Transferrin (Immunoassay)","Transferrin, Total","Siderophilin","Transferrina"],"abbreviations":["Tf"],"loinc":[{"code":"3034-6","primary":true},{"code":"22674-6","primary":false},{"code":"35229-4","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"g/L","display":"g/L"}],"referenceRanges":[{"population":"Men, 18–80","low":177,"high":329,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp's interval for men aged 18 to 80. ARUP prints 200–360 mg/dL for all adults with no sex or age split, which sits close to these. Labs outside the US often report in g/L (1 g/L = 100 mg/dL) with their own intervals.","sources":[{"title":"Transferrin (test 004937)","url":"https://www.labcorp.com/tests/004937/transferrin","publisher":"Labcorp"}]},{"population":"Women, 18–80","low":192,"high":364,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp's interval for women aged 18 to 80. It is also printed on Labcorp's sample report for a 61-year-old woman. ARUP prints 200–360 mg/dL for all adults with no sex or age split, which sits close to these. Labs outside the US often report in g/L (1 g/L = 100 mg/dL) with their own intervals.","sources":[{"title":"Transferrin (test 004937)","url":"https://www.labcorp.com/tests/004937/transferrin","publisher":"Labcorp"},{"title":"Transferrin sample report (test 004937)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/004937.pdf","publisher":"Labcorp"}]},{"population":"81+","low":149,"high":313,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp's interval for adults over 80, the same for both sexes.","sources":[{"title":"Transferrin (test 004937)","url":"https://www.labcorp.com/tests/004937/transferrin","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A protein that carries iron through your blood. It tends to rise when iron stores are low and fall with inflammation, liver problems or low protein.","url":"https://bloodtesttracker.com/markers/transferrin","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}