NMN serves as a precursor to NAD+, which means it is directly involved in the biosynthesis of NAD+. Once NMN enters cells, it is converted into NAD+ by the enzyme Nicotinamide Mononucleotide Adenylyltransferase (NMNAT). NAD+ then participates in various metabolic pathways such as glycolysis, the Krebs cycle, and oxidative phosphorylation, playing a crucial role in cellular energy production.
