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Folic acid, vitamin B9.
To assist in evaluation of diagnoses that are related to fluctuations in folate levels such as vitamin B12 deficiency and malabsorption.
Serum collected in a gold-, red-, or red/gray-top tube.
(Method: Immunochemiluminometric assay [ICMA])
|Conventional Units||SI Units (Conventional Units × 2.265)|
|Normal||Greater than 5.4 ng/mL||Greater than 12.2 nmol/L|
|Intermediate||3.4–5.4 ng/mL||7.7–12.2 nmol/L|
|Deficient||Less than 3.4 ng/mL||Less than 7.7 nmol/L|
|Values may be slightly decreased in older adults due to the effects of medications and the presence of multiple chronic or acute diseases with or without muted symptoms.|