{"id":"albumin","name":"Albumin","shortName":"Albumin","aliases":["ALB","Albumin, Serum","Serum Albumin","Albumin Level","Albúmina","Albumine","Albumin, S","Albumin, Plasma","Albumin Serum","Albumin, Total","Serum Albumin Level","Albumin (BCG)","Albumin (BCP)","Albumin, Bromocresol Green","Albumin, Bromocresol Purple","Albumina","Albumina Sérica","Albumin, Serum or Plasma"],"abbreviations":["ALB","Alb"],"loinc":[{"code":"1751-7","primary":true},{"code":"61151-7","primary":false},{"code":"61152-5","primary":false},{"code":"54347-0","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"g/dL","display":"g/dL"},{"ucum":"g/L","display":"g/L"},{"ucum":"umol/L","display":"µmol/L"},{"ucum":"mg/dL","display":"mg/dL"}],"referenceRanges":[{"population":"Adults","low":3.5,"high":5,"unit":"g/dL","unitDisplay":"g/dL","note":"Mayo Clinic Laboratories interval for ages 12 months and older, the same for men and women. ABIM lists 3.5-5.5 g/dL and MedlinePlus 3.4-5.4 g/dL (34-54 g/L). Labcorp prints narrower, age- and sex-specific limits: 4.1-5.2 g/dL for men and 3.9-5.0 g/dL for women aged 13 to 30, and its sample reports show 4.0-5.0 g/dL at age 40 and 3.8-4.8 g/dL at age 62 for men, so the usual span drifts down with age. Labcorp's published age cut-offs after age 30 could not be found, so a single adult range is used. Dye methods also differ: bromocresol green reads higher than bromocresol purple.","sources":[{"title":"Albumin, Serum (test ALBS1), Mayo Clinic Laboratories Extended Catalog","url":"https://www.testcatalog.org/show/ALBS1","publisher":"Mayo Clinic Laboratories"},{"title":"Comprehensive Metabolic Panel, Serum (test CMAMA), Mayo Clinic Laboratories Extended Catalog","url":"https://www.testcatalog.org/show/CMAMA","publisher":"Mayo Clinic Laboratories"},{"title":"ABIM Laboratory Test Reference Ranges, January 2026","url":"https://www.abim.org/Media/bfijryql/laboratory-reference-ranges.pdf","publisher":"American Board of Internal Medicine","year":2026},{"title":"Albumin blood (serum) test (MedlinePlus Medical Encyclopedia)","url":"https://medlineplus.gov/ency/article/003480.htm","publisher":"MedlinePlus, National Library of Medicine"},{"title":"Pediatric Testing Reference Ranges (Albumin, test 001081)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp"},{"title":"Albumin (test 001081), sample patient report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001081.pdf","publisher":"Labcorp"},{"title":"Comp. Metabolic Panel (14) (test 322000), sample patient report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/322000.pdf","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The main protein in blood plasma. Made by the liver, it keeps fluid inside your blood vessels and carries many substances.","url":"https://bloodtesttracker.com/markers/albumin","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}