{"id":"prealbumin","name":"Prealbumin (Transthyretin)","shortName":"Prealbumin","aliases":["Prealbumin","Pre-Albumin","Transthyretin","TTR","Prealbumin, Serum","Prealbumin Level","Prealbumin (Transthyretin)","Transthyretin (Prealbumin)","Thyroxine Binding Prealbumin","PAB","Prealbumin, Quantitative","Pre albumin","TBPA"],"abbreviations":["PAB","TTR","TBPA"],"loinc":[{"code":"14338-8","primary":true},{"code":"46130-1","primary":false},{"code":"6793-4","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"g/L","display":"g/L"},{"ucum":"mg/L","display":"mg/L"}],"referenceRanges":[{"population":"18+","low":14,"high":35,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp's interval for men and women. Its published table lists it for ages 18 to 40, and its sample report for a 36-year-old prints the same interval. ABIM (January 2026) gives a narrower 16–30 mg/dL for adults. Intervals differ between labs and methods, so use the one printed on your own report.","sources":[{"title":"Pediatric Testing Reference Ranges (Prealbumin, test 016931)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp"},{"title":"Prealbumin (test 016931) sample report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/016931.pdf","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A protein made by the liver that carries thyroid hormone and a vitamin A complex. It falls with inflammation, so it is a weak guide to nutrition on its own.","url":"https://bloodtesttracker.com/markers/prealbumin","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}