Thiamine Level Test in Arizona

What this test measures

Vitamin B1, also called thiamine, acts as a cofactor for enzymes involved in energy metabolism. Without enough of it, cells cannot efficiently process carbohydrates, and tissues with high energy demands such as nerves and the heart are especially affected. Because the body stores only small amounts, a steady dietary supply is important.

The test is often performed on whole blood or as a measure of thiamine pyrophosphate, the active form. Some laboratories use serum or plasma thiamine instead. The collection is a standard blood draw, and the report compares the value with an established reference range for the method used.

Deficiency can develop with prolonged poor intake, heavy alcohol use, or conditions that impair absorption. Early signs may include fatigue, irritability, and tingling, while more advanced deficiency can affect the heart and nervous system. Testing helps a healthcare provider determine whether thiamine status is contributing to symptoms.