β-Nicotinamide Adenine Dinucleotide by Hunan Naturext

β-Nicotinamide Adenine Dinucleotide (abbreviated as NAD⁺) is a core coenzyme present in all living cells, composed of nicotinamide, adenine, and other components linked by phosphate bonds.It acts as a "catalyst" for cellular energy metabolism, driving mitochondria to produce over 95% of the body's life-sustaining energy. It is also an essential raw material for DNA repair enzymes (such as PARP), enabling timely repair of cellular damage. Additionally, as the "activation key" for Sirtuins longevity proteins, it regulates gene expression and the aging process. Its levels decline with age, and it is often supplemented through precursors like NMN to maintain cellular homeostasis.