Vitamin B1 (Thiamine)


Vitamin B1 is required for branched-chain amino acid and carbohydrate metabolism. Vitamin B1 deficiency is most often due to alcoholism or chronic illness. In the early stage, patients with vitamin B1 deficiency exhibit anorexia, irritability, apathy, and generalized weakness. Prolonged deficiency causes beriberi.

Vitamin B1 (Thiamine)


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  • Fasting Required: Yes
  • Preferred Specimen: Whole Blood
  • Patient Preparation: Overnight fasting is required
  • Reference Range(s):
  • Adults 78-185 nmol/L
  • Turnaround Time: 3 Days
  • Test Code: 5042