This combination pairs NAD+ with nicotinamide mononucleotide (NMN), its immediate biosynthetic precursor in the salvage pathway. While direct NAD+ administration repletes intracellular pools rapidly, NMN works via enzymatic conversion through NMN adenylyltransferase (NMNAT) to continuously regenerate NAD+. The dual approach aims to provide both immediate NAD+ availability and a sustained biosynthetic supply, supporting mitochondrial function, sirtuin activation, and DNA repair mechanisms. This formulation is designed for research models where comprehensive and prolonged NAD+ elevation is the goal.