Item Value
Test name Folate, serum
Available Stat? No
Turn around times 1 - 5 days
In House Availability Tuesday and Friday (day shift)
Performed by China Basin Chemistry
Patient Preparation An overnight fast is recommended prior to specimen collection for reference ranges to apply.
Normal range
RESULT INTERPRETATION
< 2 ng/mL LOW. Consistent with folate deficiency
2 - 4 ng/mL BORDERLINE. Additional testing may be indicated depending on the clinical circumstances.
> 4 ng/mL NORMAL. Suggests folate is not deficient, unless the individual has recently consumed a folate-containing meal or supplement. In such cases, RBC folate can be obtained. The RBC folate level is not needed in routine testing because it does not provide additional information and more costly to obtain.


If patient was not fasting, the normal ranges may not apply.

Reference range adopted from https://www.uptodate.com and verified in-house with lab donor samples.
Container type Gold top or Red top
Amount to Collect 1 mL blood
Sample type Serum

If you have additional questions regarding this test, please call: 415-353-1667