{"id":"tibc","name":"Total Iron-Binding Capacity (TIBC)","shortName":"TIBC","aliases":["Total Iron Binding Capacity","TIBC","Iron Binding Capacity","Iron Binding Capacity, Total","Iron Binding Cap","TIBC, Total","TIBC (Calculated)","Iron Bind.Cap.(TIBC)","Iron Binding Capacity, Total (TIBC)","Total Iron Binding Capacity, Serum","Capacidad total de fijación de hierro","Eisenbindungskapazität"],"abbreviations":["TIBC"],"loinc":[{"code":"2500-7","primary":true},{"code":"14800-7","primary":false},{"code":"35215-3","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"ug/dL","display":"µg/dL"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"18+","low":250,"high":450,"unit":"ug/dL","unitDisplay":"µg/dL","note":"Labcorp prints 250–450 µg/dL and ARUP prints 240–450 µg/dL. MedlinePlus lists wider, sex-specific numbers (men 171–505, women 149–492 µg/dL), which come from a different method or population.","sources":[{"title":"Iron and Total Iron-binding Capacity (TIBC) (test 001321)","url":"https://www.labcorp.com/tests/001321","publisher":"Labcorp"},{"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":"How much iron your blood's carrier protein, transferrin, could hold in total. It usually rises when iron stores are low.","url":"https://bloodtesttracker.com/markers/tibc","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}