NAAD sodium salt (NAAD Na salt) is a substrate of nicotinamide adenine dinucleotide synthase and can be used in studies about the specificity and kinetics of the substrate.

NAAD sodium salt, produced in the biosynthesis of NAD+ from tryptophan and NA2, was elevated from less than 20 nM to as high as 0.91 μM in peripheral blood mononuclear cells[3].

In mice, after the administration of nicotinic acid (500 mg/kg; i.p.), NAAD sodium salt is observed in kidneys, ovaries, lung, heart, and brain while after the administration of radioactive nicotinamide (500 mg/kg; i.p.), NAAD sodium salt is only in mouse liver[3].