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Midwest · Vitamin B1 Test – Vitamin Deficiency Tests

Vitamin B1 Test – Vitamin Deficiency Tests in Missouri

Vitamin B1 Test – Vitamin Deficiency Tests can be ordered without a referral from your own doctor, and this guide covers what to expect. This blood test measures vitamin B1 (thiamine) levels to help assess whether a deficiency may be present. It is typically used when a clinician suspects inadequate intake or absorption.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in Missouri

Here is what you need before ordering and completing the Vitamin B1 Test – Vitamin Deficiency Tests in MO. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Preparation instructions can vary, so it is important to follow the specific directions provided by the collection laboratory. This may include fasting or avoiding certain supplements…
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

The vitamin B1 test is a laboratory analysis that quantifies thiamine in the blood. Thiamine is a water-soluble vitamin essential for energy metabolism and proper nerve function. The test can help identify low levels that may contribute to certain symptoms.

What it measures

  • Vitamin B1 (thiamine) — reflects the amount of thiamine present in the blood
  • Thiamine diphosphate — sometimes measured as the active form of thiamine in red blood cells
  • Transketolase activity — an enzyme function test that can indirectly indicate thiamine status

What the test involves

A standard blood draw is performed, usually from a vein in the arm, to collect a small sample for analysis. The sample is then processed by the laboratory to measure thiamine concentration.

Why it is often ordered

A clinician may order this test when a person has symptoms suggesting thiamine deficiency, such as confusion, tingling, or muscle weakness. It can also be used to monitor individuals with conditions that affect nutrient absorption or those with increased nutritional needs.

Preparation

Preparation instructions can vary, so it is important to follow the specific directions provided by the collection laboratory. This may include fasting or avoiding certain supplements before the test.

How results are reported

Results are typically reported as a numeric value that is compared to a reference range established by the testing laboratory. Reference ranges can differ between laboratories, so results should always be interpreted in the context of the lab that performed the test.

Before you go

  • Whether fasting is required before the test
  • If any medications or supplements should be avoided
  • The expected turnaround time for results

Cities

Vitamin B1 Test – Vitamin Deficiency Tests in Missouri communities

Choose your city for local context and to order this test.

St. Louis2,092,481Vitamin B1 Test – Vitamin Deficiency TestsKansas City1,644,497Vitamin B1 Test – Vitamin Deficiency TestsSpringfield298,722Vitamin B1 Test – Vitamin Deficiency TestsColumbia136,736Vitamin B1 Test – Vitamin Deficiency TestsIndependence122,230Vitamin B1 Test – Vitamin Deficiency TestsLee's Summit100,772Vitamin B1 Test – Vitamin Deficiency TestsO'Fallon90,802Vitamin B1 Test – Vitamin Deficiency TestsJoplin81,025Vitamin B1 Test – Vitamin Deficiency TestsSt. Joseph80,099Vitamin B1 Test – Vitamin Deficiency TestsSt. Charles70,218Vitamin B1 Test – Vitamin Deficiency TestsBlue Springs58,265Vitamin B1 Test – Vitamin Deficiency TestsSt. Peters57,289Vitamin B1 Test – Vitamin Deficiency TestsFlorissant52,382Vitamin B1 Test – Vitamin Deficiency TestsChesterfield49,675Vitamin B1 Test – Vitamin Deficiency TestsWentzville43,213Vitamin B1 Test – Vitamin Deficiency TestsJefferson City43,076Vitamin B1 Test – Vitamin Deficiency TestsCape Girardeau39,415Vitamin B1 Test – Vitamin Deficiency TestsWildwood35,384Vitamin B1 Test – Vitamin Deficiency TestsOakville35,357Vitamin B1 Test – Vitamin Deficiency TestsUniversity City34,953Vitamin B1 Test – Vitamin Deficiency TestsBallwin30,998Vitamin B1 Test – Vitamin Deficiency TestsLiberty30,129Vitamin B1 Test – Vitamin Deficiency TestsRaytown29,893Vitamin B1 Test – Vitamin Deficiency TestsKirkwood29,233Vitamin B1 Test – Vitamin Deficiency TestsMehlville28,672Vitamin B1 Test – Vitamin Deficiency TestsMaryland Heights28,141Vitamin B1 Test – Vitamin Deficiency TestsGladstone26,825Vitamin B1 Test – Vitamin Deficiency TestsGrandview25,931Vitamin B1 Test – Vitamin Deficiency TestsHazelwood25,466Vitamin B1 Test – Vitamin Deficiency TestsBelton23,832Vitamin B1 Test – Vitamin Deficiency TestsWebster Groves23,817Vitamin B1 Test – Vitamin Deficiency TestsNixa22,925Vitamin B1 Test – Vitamin Deficiency TestsRaymore22,722Vitamin B1 Test – Vitamin Deficiency TestsSedalia21,696Vitamin B1 Test – Vitamin Deficiency TestsOzark20,874Vitamin B1 Test – Vitamin Deficiency TestsArnold20,808Vitamin B1 Test – Vitamin Deficiency TestsOld Jamestown20,382Vitamin B1 Test – Vitamin Deficiency TestsRolla19,949Vitamin B1 Test – Vitamin Deficiency TestsWarrensburg19,509Vitamin B1 Test – Vitamin Deficiency TestsAffton18,925Vitamin B1 Test – Vitamin Deficiency TestsFerguson18,826Vitamin B1 Test – Vitamin Deficiency TestsConcord18,760Vitamin B1 Test – Vitamin Deficiency TestsCreve Coeur18,648Vitamin B1 Test – Vitamin Deficiency TestsRepublic18,313Vitamin B1 Test – Vitamin Deficiency TestsManchester18,308Vitamin B1 Test – Vitamin Deficiency TestsFarmington17,959Vitamin B1 Test – Vitamin Deficiency TestsSpanish Lake17,721Vitamin B1 Test – Vitamin Deficiency TestsKirksville17,600Vitamin B1 Test – Vitamin Deficiency TestsHannibal17,165Vitamin B1 Test – Vitamin Deficiency TestsClayton16,905Vitamin B1 Test – Vitamin Deficiency TestsLake St. Louis16,665Vitamin B1 Test – Vitamin Deficiency TestsPoplar Bluff16,318Vitamin B1 Test – Vitamin Deficiency TestsLemay16,312Vitamin B1 Test – Vitamin Deficiency TestsSikeston16,054Vitamin B1 Test – Vitamin Deficiency TestsOverland15,908Vitamin B1 Test – Vitamin Deficiency TestsFort Leonard Wood15,629Vitamin B1 Test – Vitamin Deficiency TestsGrain Valley15,435Vitamin B1 Test – Vitamin Deficiency TestsCarthage15,395Vitamin B1 Test – Vitamin Deficiency TestsJackson15,272Vitamin B1 Test – Vitamin Deficiency TestsLebanon14,880Vitamin B1 Test – Vitamin Deficiency Tests