Vitamin B1 (Thiamine)
Vitamin B1 (thiamine) measures the level of this essential water-soluble vitamin in your blood. Thiamine is critical for energy metabolism, nerve function, and carbohydrate processing.
Category: Vitamins & Minerals
Also known as: vitamin b1, thiamine, thiamin, vit b1, Vit B-1, Vitamin B-1
Reference range: 70–180 nmol/L (Source: ABIM)
Standard unit: nmol/L
High values may indicate
High vitamin B1 levels are rare and generally not harmful, as excess thiamine is excreted in urine. Very high levels may reflect excessive supplementation.
Low values may indicate
Low vitamin B1 levels may indicate beriberi, Wernicke-Korsakoff syndrome (common in alcoholism), malnutrition, malabsorption, or prolonged diuretic use, and can cause fatigue, nerve damage, and heart failure.
Frequently asked questions
- What is a normal Vitamin B1 (Thiamine) level?
- A typical reference range for Vitamin B1 (Thiamine) is 70–180 nmol/L (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Vitamin B1 (Thiamine) measured in?
- Vitamin B1 (Thiamine) is most commonly reported in nmol/L. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Vitamin B1 (Thiamine) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Vitamin B1 (Thiamine) over time?
- Yes. Upload results from any lab and BloodId charts your Vitamin B1 (Thiamine) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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