{"id":"folate","name":"Folate (Vitamin B9), Serum","shortName":"Folate","aliases":["Folate, Serum","Folate","Folic Acid","Vitamin B9","Folic Acid (Folate), Serum","Folate Level","Folate (Folic Acid), Serum","Serum folate","Folato","Folic Acid, Serum","Folate Serum","Serum Folic Acid","Vitamin B9, Serum","Folic Acid Level","Folate (Vitamin B9)","Serum Folate Level","Folate (Folic Acid)","Folic Acid (Vitamin B9)"],"abbreviations":["B9","Vit B9"],"loinc":[{"code":"2284-8","primary":true},{"code":"14732-2","primary":false},{"code":"35210-4","primary":false}],"specimen":"serum","units":[{"ucum":"ng/mL","display":"ng/mL"},{"ucum":"nmol/L","display":"nmol/L"}],"referenceRanges":[{"population":"Adults","low":3,"high":null,"unit":"ng/mL","unitDisplay":"ng/mL","note":"Labcorp's published interval (test 002014) is a lower limit only: above 3.0 ng/mL. Many labs print only a lower limit or cap the upper end of what the assay can measure. MedlinePlus lists 2.7–17.0 ng/mL (6.12–38.52 nmol/L) and says ranges vary by lab. In the US, average serum folate more than doubled after folic acid fortification began (BOND 2015), so results above the top of older ranges are common. Use the range printed on your own report.","sources":[{"title":"Folate (Folic Acid) (test 002014)","url":"https://www.labcorp.com/tests/002014/folate-folic-acid-serum","publisher":"Labcorp"},{"title":"Folic acid - test","url":"https://medlineplus.gov/ency/article/003686.htm","publisher":"MedlinePlus (National Library of Medicine)","year":2025}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"Measures folate (vitamin B9) in your blood. It mostly reflects what you ate recently, and it helps explain anemia and low folate intake.","url":"https://bloodtesttracker.com/markers/folate","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}