#ExistInterpData>Total thiamine, measured as thiamine (vitamin B1) and thiamine monophosphate, is reported. However, the biologically active form of the vitamin, thiamine diphosphate (TDP), is best measured in whole blood, and is not found in measurable concentration in plasma. Plasma thiamine concentration reflects recent intake rather than body stores.
||Whole blood is the preferred specimen for thiamine assessment. Approximately 80% of thiamine present in whole blood is found in red blood cells. Refer to Vitamin B1 (Thiamine), Whole Blood (0080388).
||B1 Vitamin (Vitamin B1 (Thiamine), Plasma)
, Thiamine (Vitamin B1 (Thiamine), Plasma)
, Vitamin B1 (Thiamine), LC/MS/MS (Vitamin B1 (Thiamine), Plasma)