A B vitamin essential for converting food into energy and for nerve function.
Vitamin B1, also called thiamine, is a water-soluble vitamin your body needs to turn food into energy. It plays a central role in how cells use carbohydrates and supports the nervous system and the heart.
Your body stores only small amounts, so a steady dietary intake matters. Most blood testing measures thiamine in whole blood, where it largely sits inside red blood cells as its active form, thiamine diphosphate.
Thiamine is essential for energy production and nerve function, so a shortage can cause fatigue, nerve symptoms, and in severe cases heart and brain problems. Deficiency is more common in heavy alcohol use, restricted diets, and after some types of surgery.
Testing helps confirm a suspected deficiency and guide whether replacement is needed. Levels that are too high are uncommon and usually reflect supplementation rather than a health concern.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Measured in whole blood (thiamine diphosphate) by HPLC. Ranges are guidance and vary by laboratory and method.
| Status | Whole blood thiamine diphosphate |
|---|---|
| Typical adult reference | Approximately 70 to 200 nmol/L |
Confirm the exact reference interval with the reporting laboratory, as cutoffs differ between assays.
You learn whether your thiamine level is low, adequate, or high. A low result can support a picture of deficiency, especially alongside symptoms or risk factors such as heavy alcohol use, poor intake, or conditions that reduce absorption. A normal result makes deficiency less likely.
Thiamine is sensitive to light, so improper handling can lower the measured value. Recent supplementation can raise levels. Whole blood measurement is preferred over plasma because most thiamine sits inside red cells.
Read alongside other B vitamins where relevant and with the clinical picture, including alcohol intake, nutrition, and any nerve symptoms.
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