Vitamin B1 (Thiamine), Whole Blood
The vitamin behind energy metabolism, depleted by alcohol use, malnutrition, and malabsorption.
Consider this test if:
- Heavy or chronic alcohol use, or a history of poor dietary intake
- Bariatric surgery, chronic diarrhea, or other causes of malabsorption
- Unexplained fatigue, memory problems, neuropathy, or unsteadiness
- Heart failure being worked up, especially with long-term diuretic use
- Confirming that thiamine repletion has restored your level
- HSA/FSA eligible
- Typical results in 4-6 days · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
Blood should be drawn in the morning before breakfast and before taking any medications. Thiamine supplements raise the result, so note your dose and timing; if you are confirming a baseline rather than tracking repletion, consistent supplement habits make results comparable.
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What this test is for
Thiamine (vitamin B1) is an essential nutrient your body cannot make, used as a coenzyme for the reactions that turn carbohydrates, fats, and alcohol into usable energy, and for nerve and neurotransmitter function. Whole blood is the preferred sample because thiamine pyrophosphate, the main active form, concentrates inside red cells and accounts for about 90% of blood thiamine. Early deficiency is nonspecific: fatigue, irritability, poor memory, sleep disturbance, low appetite, and abdominal discomfort. Severe or prolonged deficiency causes beriberi (heart failure or peripheral neuropathy) and Wernicke-Korsakoff syndrome, with confusion, eye-movement problems, and unsteady gait. Risk concentrates in heavy alcohol use, malnutrition, bariatric surgery or other malabsorption, prolonged vomiting or diarrhea, dialysis, and heart failure, where correcting a deficiency can improve cardiac function.
- Specimen
- Whole blood
- Measures
- Substance concentration
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 4-6 days
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost, covering the lab and what it takes to run the service. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a physician's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate physician visit before purchasing.
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