NAD+

NAD+

Nicotinamide adenine dinucleotide ($\text{NAD}^+$) is an essential coenzyme found in all living cells that plays a central role in a vast array of biological processes, most notably cellular energy metabolism and DNA repair. Fundamentally, as a critical hydrogen carrier in the electron transport chain, $\text{NAD}^+$ is indispensable for mitochondrial ATP production and cellular energy generation. NAD+

Consequently, research has extensively examined how declining $\text{NAD}^+$ levels with age correlate with key physiological hallmarks of aging, including mitochondrial dysfunction, impaired DNA repair, increased inflammation, and reduced cellular resilience. Crucially, studies have investigated $\text{NAD}^+$ and its precursors for their ability to activate sirtuins—a family of $\text{NAD}^+$-dependent deacetylase enzymes involved in longevity pathways, gene expression regulation, and metabolic homeostasis.

Beyond energy metabolism, research has also explored its essential role in PARP enzyme activity, which is critical for genomic stability and the cellular response to DNA strand breaks. In addition, its potential implications for metabolic health, cognitive function, and cardiovascular resilience continue to generate strong clinical interest. Overall, the multifaceted functions of $\text{NAD}^+$ make it one of the most heavily researched molecules in modern longevity science.