NMN (Nicotinamide Mononucleotide)
NMN stands for nicotinamide mononucleotide, a molecule naturally occurring in all life forms. At the molecular level, NMN is a ribo-nucleotide, which is a basic structural unit of the nucleic acid RNA. Structurally, NMN is composed of a nicotinamide group, a ribose and a phosphate group (Figure 1). NMN is the direct precursor of the essential molecule nicotinamide adenine dinucleotide (NAD+) and is considered a key molecule to increase NAD+ levels in cells.