Vitamin B1 Supplementation Monitoring, Plasma
Also known as: VIT B1 P
Use
This test measures the concentration of Vitamin B1 (thiamine) in plasma to monitor recent intake, which can help assess supplementation levels. It is important to note that plasma thiamine levels reflect short-term intake and may not indicate overall deficiency, as the biologically active form, thiamine diphosphate (TDP), is not present in measurable concentrations in plasma.
Special Instructions
This test is not recommended for the evaluation of thiamine sufficiency as TDP levels should be measured using whole blood specimens for an accurate assessment of nutritional status.
Limitations
The test is not suitable for assessing thiamine stores in the body as it does not measure thiamine diphosphate (TDP), the active form, which is best determined through whole blood specimens. Plasma concentrations reflect short-term intake and not total body stores.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 20468-5
Result Turnaround Time
5-7 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
1 mL
Minimum Volume
0.2 mL
Container
Green (sodium or lithium heparin), lavender (EDTA), plasma separator tube, or pink (K2 EDTA).
Collection Instructions
Separate plasma from cells within one hour of collection. Transfer plasma to an ARUP Standard Transport Tube.
Causes for Rejection
Hemolyzed specimens or specimens other than heparin or EDTA plasma.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 1 week |
| Frozen | 6 months |