Vitamin B1 (Thiamine) Serum Mass Concentration
This test measures the amount of vitamin B1 (thiamine), an essential nutrient important for nerve function and energy production, in your blood serum.
["Checking your vitamin B1 levels helps assess whether you may have a deficiency that could affect your health."]
Key facts at a glance
- LOINC
- 2999-1
- Short code
- Vit B1 SerPl-mCnc
- Synonyms
- Vit B1 SerPl-mCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like memory problems, nerve pain, muscle weakness, or unexplained fatigue. It may also be used in patients with conditions like alcohol use disorder, poor diet, or certain medical treatments that can deplete thiamine levels.
What to Expect Before the Test
No special preparation is usually needed. You may be asked to fast for a few hours before the test, but always follow your provider’s instructions. Bring any medications you’re taking to your appointment.
What the Test Involves
A blood sample will be drawn from a vein, typically in your arm. The process is quick and usually causes only minor discomfort. The sample is then sent to a lab for analysis.
What the Results Mean
Results are compared to standard reference ranges for healthy individuals. Low levels may indicate a deficiency, while very high levels are less common but could signal underlying conditions like certain cancers or metabolic disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Low vitamin B1 levels can lead to neurological issues, such as peripheral neuropathy (nerve damage), Wernicke-Korsakoff syndrome (a severe brain disorder), or weakened immune function. Chronic deficiency may also contribute to heart disease or anemia. Your provider will interpret results in the context of your symptoms and medical history.
Short name
Vitamin B1 Level
Frequently asked questions
How long does it take to get my results?
Can I eat or drink anything before the blood draw?
What if my vitamin B1 levels are low?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy