Vitamin B1, Total Thiamine
Thiamine (vitamin B1) is essential for converting carbohydrates into energy and supporting nervous system function. This test detects deficiency, which can cause fatigue, muscle weakness, and impaired cognitive function—symptoms that overlap with overtraining or poor recovery.
Athletes have higher carbohydrate metabolism and energy demands, increasing thiamine requirements. Inadequate intake or absorption can blunt aerobic performance, slow recovery, and impair coordination; testing is most relevant for endurance athletes, those with restricted diets, or individuals experiencing unexplained fatigue despite adequate training.
Turnaround Time
3 days (up to 7 days)
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$27.90$85
3.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$27.90
Peer-reviewed sources supporting the educational content on this page.
Vitamin B1, Total Thiamine
Thiamine (vitamin B1) is essential for converting carbohydrates into energy and supporting nervous system function. This test detects deficiency, which can cause fatigue, muscle weakness, and impaired cognitive function—symptoms that overlap with overtraining or poor recovery.
The Vitamin B1, Total Thiamine test starts at $27.90 at BioReference. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $25.90.
Results for the Vitamin B1, Total Thiamine test are typically ready about 3 days after your draw, and up to 7 days for some samples. Your results land in your Insider portal.
No. When you order the Vitamin B1, Total Thiamine test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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