NAD+
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NAD+ | Coenzyme Complex
Longevity
Nicotinamide Adenine Dinucleotide (NAD+) is a critical coenzyme found in every living cell, serving as a central hub for cellular energy metabolism and a key signaling molecule in hundreds of biological processes. NAD+ levels decline significantly with age — by up to 50% between young adulthood and middle age — and this decline has been strongly linked to metabolic dysfunction, neurodegeneration, reduced DNA repair capacity, and accelerated aging. Research into NAD+ restoration has become one of the most active areas of longevity and metabolic science.
Cellular Energy Production — NAD+ is indispensable to glycolysis, the TCA cycle, and oxidative phosphorylation, serving as the primary electron carrier in mitochondrial ATP synthesis across all cell types.
Sirtuin Activation — NAD+ is the essential substrate for sirtuin deacylases (SIRT1–SIRT7), which regulate metabolism, stress resistance, inflammation, and epigenetic gene expression in aging research models.
DNA Repair — PARP enzymes, which are critical for single- and double-strand DNA break repair, consume NAD+ as their primary substrate — making adequate NAD+ levels essential for genomic stability research.
Neuroprotection — Declining NAD+ levels are associated with neurodegenerative conditions in research models; supplementation has shown potential neuroprotective effects in models of Alzheimer's, Parkinson's, and axonal degeneration.
Immune & Inflammatory Regulation — NAD+ modulates CD38 and NNMT activity in immune cells, influencing macrophage polarization, T-cell metabolism, and systemic inflammatory signaling pathways.
