{"id":"uibc","name":"Unsaturated Iron-Binding Capacity (UIBC)","shortName":"UIBC","aliases":["Unsaturated Iron Binding Capacity","Unsaturated Iron-Binding Capacity","Unsaturated Iron Binding Capacity (UIBC)","UIBC","Iron Binding Capacity, Unsaturated","Unsat Iron Binding Cap","UIBC, Serum","UIBC (Direct)","Latent Iron-Binding Capacity"],"abbreviations":["UIBC"],"loinc":[{"code":"2501-5","primary":true},{"code":"22753-8","primary":false},{"code":"35216-1","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"ug/dL","display":"µg/dL"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"Men, 18–60","low":111,"high":343,"unit":"ug/dL","unitDisplay":"µg/dL","note":"Labcorp's interval for men aged 18 to 60. It is printed on Labcorp's sample report for a 32-year-old man and in its 2022 pediatric reference-range document. Neither source lists a UIBC interval above age 60, so older adults should use the range printed on their own report.","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}]},{"population":"Women, 18–60","low":131,"high":425,"unit":"ug/dL","unitDisplay":"µg/dL","note":"Labcorp's interval for women aged 18 to 60, from its 2022 pediatric reference-range document. No UIBC interval above age 60 was listed. ARUP and Mayo Clinic Laboratories publish TIBC and iron but no UIBC interval in the pages reviewed.","sources":[{"title":"Pediatric Testing Reference Ranges","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"How much of your blood's iron-carrying capacity is still empty. Added to serum iron, it gives total iron-binding capacity (TIBC).","url":"https://bloodtesttracker.com/markers/uibc","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}