Vitamins & Minerals

Vitamin B1 (Thiamine)

A healthy result should fall into the range 66.5 - 200 nmol/L.

Thiamine is vitamin B1, a member of the B complex group of vitamins. It’s especially important in the body for nervous system and muscle function. Thiamine acts as a coenzyme for carbohydrate and amino acid metabolism. Your body needs this B vitamin to produce hydrochloric acid so you can digest your food properly. Vitamin B1 is closely tied to energy, cholesterol and neurotransmitter production in the body. 

A vitamin B1 blood test tests for deficiencies or excesses of the vitamin.

Normal Ranges for Vitamin B1 in ug/dL:

Adults: 2.5-7.5 ug/dL

Critical Range: outside the normal range



Vitamin B1 (Thiamine) result calculator

insert the value from you Vitamin B1 (Thiamine) test result.

What does it mean if your Vitamin B1 (Thiamine) result is too low?

Vitamin B1 deficiency can start out with fatigue, depression, irritability, sleep disturbances, GI disturbances from carbohydrates, and neuropathy (burning feet sensation). Deficiency is called beriberi. It can lead to rapid heart rate and heart enlargement. This could then cause breathing difficulties and congestive heart failure.

Beriberi can also cause mental and cognitive impairments when related to alcohol abuse. Some of these symptoms of vitamin deficiency include dementia, amnesia, confusion, abnormal eye movements, seizures and difficulty walking, 

 The needs for vitamin B1 increase during pregnancy, breast feeding, strenuous activity, growth spurts and during a fever. 

Some specific causes of low vitamin B1 might be: 

- Poor dietary intake 

- Chronic alcohol consumption

- Anorexia

- Gastric bypass surgery

- Diabetes

- Dieting

- Consuming African silkworms or ferns (These foods contain an enzyme called thiaminase that destroys thiamine.)

- Consuming tea and coffee (decaffeinated or caffeinated) in large amounts (contains thiaminase)

- Consuming raw, fresh-water fish or raw shellfish (These foods contain thiaminase.)

- The use of diuretics

- Digestive disorders (Crohn’s disease, celiac disease, absorption of nutrient problems)

- Kidney dialysis

What does it mean if your Vitamin B1 (Thiamine) result is too high?

High levels of thiamine are rare but may occur if excessive amounts of the vitamin are consumed, either in supplements or from foods. 


Are you concerned about your lab report?
Select your plan, upload your lab reports and we’ll provide you with a meaningful interpretation.

Basic Interpretation
  • Instant interpretation
  • Use self upload form
  • 1000+ biomarkers explained
  • Nutrition Recommendations
  • Cancel anytime
Full Interpretation
  • Instant interpretation
  • We upload 4 reports for you
  • 1000+ biomarkers explained
  • Nutrition Recommendations
  • Cancel anytime
  • Online support
Own It For Life
  • Unlimited access
  • No subscription
  • Instant interpretations
  • We upload 10 reports for you
  • 1000+ biomarkers explained
  • Nutrition Recommendations
  • Dedicated support

Test results don't lie. Learn what is happening inside your body.

Health is not exactly rocket science. You just have to know what your body needs and doesn't need. Your medical tests contain that information. Upload them to our service and we’ll help you understand, organize, and act on them.

Get Started

Medical results explained and interpreted. customer review

"I was really concerned about my lab results and my GP was not able to see me for another week. Through HealthMatters I was able to interpret my results instantly." thankfull female customer

"I've been keeping all my lab results in a spreadsheet, covering approximately 20 years. The HealthMatters team helped me upload that info into the cloud. I can show this data to my family and doctors now easily." thankful young female customer

"I had no idea what my lab results meant. Here I found all the biomarkers that I was looking for online. Finally, I have not only organized them all neatly in one place, but I am also grateful to be able to understand what they mean."

Privacy and security of personal data. HIPAA and GDPR compliant badges.

Your Privacy And Security

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put security measures in place to help protect against the loss, misuse or alteration of information under our control. We use procedural, physical and electronic security methods designed to prevent people who aren't authorized from getting access to this information. Our internal code of conduct adds additional privacy protection. See our Privacy Policy for more information.