β-Nicotinamide adenine dinucleotide is widely used in biochemistry and molecular biology research as a coenzyme in redox reactions. It plays a critical role in cellular metabolism, facilitating the transfer of electrons during glycolysis, the citric acid cycle, and oxidative phosphorylation. In industrial applications, it is employed in enzymatic assays and biosensors to measure metabolic activity and detect specific biomolecules. Additionally, it is utilized in the production of pharmaceuticals and nutraceuticals, particularly in formulations aimed at enhancing cellular energy and combating oxidative stress. Its role in DNA repair mechanisms also makes it valuable in studies related to aging and cellular health.