Table 2.

Concentration of nicotinamide adenine dinucleotide (NAD⁺) and nicotinamide mononucleotide (NMN) in human whole blood on day 0

Age (years)	n*	Concentration in human whole blood (μM)
		NAD+			NMN
		Mean	SD	%CV	Mean	SD	%CV
20–29	9	32.39	7.14	22.0	1.85	0.47	25.3
30–39	10	31.99	7.10	22.2	1.80	0.44	24.5
40–49	1	28.61	NC	NC	2.15	NC	NC
50–59	4	31.35	4.94	15.8	1.88	0.42	22.5
All	24	31.89	6.43	20.1	1.85	0.43	23.0

NC not calculated as n = 1

^*Total number of people