Abstract
Levels of total NiA-NH_2, NAD (NAD^++NADH), NADP (NADP^++NADPH), N^1-methylnicotinamide (MNA), N^1-methyl-2-pyridone-5-carboxamide (2-Pyr) and N^1-methyl-4-pyridone-3-carboxamide (4-Pyr) in whole blood were measured using women students. As the results, total NiA-NH_2 level was around 60nmol/ml whole blood, NAD level around 30nmol/ml, NADP level 10nmol/ml. When the value of [total NiA-NH_2-(NAD+NADP)] is presumed to be free NiA-NH_2, its level would be around 20nmol/ml whole blood. The levels of catabolic metabolite from NiA-NH_2 such as MNA, 2-Pyr and 4-Pyr in whole blood were trace or below the limit of detection.
