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Vitamins & Nutrients

Vitamin B1 (Thiamine) Test

A B vitamin essential for energy metabolism and nerve function.

Physician reviewed
Results in 1–3 days
4,000+ lab locations

What is Vitamin B1 (Thiamine)?

A B vitamin essential for energy metabolism and nerve function.

Vitamin B1 (Thiamine) Reference Range

These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.

PopulationRange
age 18+70.0 – 180 nmol/L

Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.

What your Vitamin B1 (Thiamine) result may mean

Lower than range

Can reflect alcohol use, malnutrition, or absorption issues. Severe deficiency causes beriberi.

Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.

Related Vitamins & Nutrients biomarkers

Markers commonly tested alongside Vitamin B1 (Thiamine).

Frequently asked

No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.

Ready to test your vitamin b1 (thiamine)?

Order in two minutes, get physician-approved, and visit a lab the same day. Starts at $43.99.