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Vitamin B1 (Thiamine), Blood LC/MS/MS
Overnight fasting is recommended
3 mL whole blood collected in an EDTA (lavender-top) tube
Transfer whole blood to a plastic shipping vial to prevent breakage. Wrap tube in aluminum foil to protect from light. Freeze immediately.
Samples received frozen but not protected from light are acceptable. Wrap sample in foil before sending to lab, no disclaimer is required. Samples received refrigerated but not protected from light are unacceptable and should be rejected.
Room temperature: 72 hours
Refrigerated: 5 days
Frozen: 5 weeks
Thawed whole blood • Received room temperature • Received refrigerated
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130
Set up: Sun-Thurs; Report Available: 5-8 days
This assay has an overnight incubation period
Adults: 78-185 nmol/L
Vitamin B1 is required for branched-chain amino acid and
carbohydrate metabolism. Vitamin B1 deficiency is most
often due to alcoholism or chronic illness. In the early
stage, patients with Vitamin B1 deficiency exhibit
anorexia, irritability, apathy, and generalized weakness.
Prolonged deficiency causes beriberi.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.