{"id":"transferrin-saturation","name":"Transferrin Saturation","shortName":"TSAT","aliases":["Iron Saturation","TSAT","Iron Sat","Fe Saturation","Iron % Saturation","Transferrin Sat","Transferrin Saturation, Calculated","Iron Saturation, Calculated","Saturación de transferrina"],"abbreviations":["TSAT"],"loinc":[{"code":"2502-3","primary":true},{"code":"14801-5","primary":false}],"specimen":"calculated","units":[{"ucum":"%","display":"%"}],"referenceRanges":[{"population":"Adults","low":15,"high":55,"unit":"%","unitDisplay":"%","note":"Labcorp prints 15–55%. ARUP prints 20–50%. MedlinePlus lists 20–50% for men and 15–45% for women.","sources":[{"title":"Iron and TIBC sample report (test 001321)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001321.pdf","publisher":"Labcorp"},{"title":"Pediatric Testing Reference Ranges","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"Iron and Iron Binding Capacity (test 0020420)","url":"https://ltd.aruplab.com/Tests/Pub/0020420","publisher":"ARUP Laboratories"},{"title":"Total iron binding capacity","url":"https://medlineplus.gov/ency/article/003489.htm","publisher":"MedlinePlus Medical Encyclopedia (NIH)"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The percentage of your blood's iron-carrying protein that is loaded with iron right now, worked out from serum iron and TIBC.","url":"https://bloodtesttracker.com/markers/transferrin-saturation","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}