: FS, Fasting serum Folate
: Range applies to patients fasting 8 hours: 0-150 yrs: >5.9 ng/mL (optimal), 4.0-5.8 ng/mL (intermediate), <4.0 ng/mL (deficient)
: Light green PST (Lithium Heparin with gel) tube - 4.5 mL
: 1 light green top microtainer
: 1 mL plasma
: 0.3 mL plasma
: Separate within one hour and store at 2-8C until delivery
: 2-8 C: 7 days; -20 C: 30 days
Reasons for Rejection
: Hemolyzed specimens, EDTA, QNS
: 4 hours
: Fasting specimens recommended. Ship samples FROZEN and PROTECTED FROM LIGHT.
Search Options for the Test Directory:
1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)
2. Enter the Vanderbilt Test Code, if known.
3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.
If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail firstname.lastname@example.org.