Overview:
NAD+ (nicotinamide adenine dinucleotide) is a naturally occurring nucleotide-derived coenzyme found in virtually all living cells. Unlike BPC-157, NAD+ is not a peptide and does not contain an amino-acid sequence. It is composed of two nucleotides—one containing adenine and the other containing nicotinamide—connected through a diphosphate linkage.
Much of the scientific interest around NAD+ comes from its central role in cellular energy metabolism, redox balance, mitochondrial function, and enzymatic signaling. NAD+ functions as an electron acceptor in metabolic reactions and is converted to NADH during processes involved in ATP production.
NAD+ has been studied in experimental models involving mitochondrial metabolism, oxidative stress, DNA-repair pathways, cellular aging, inflammatory signaling, and metabolic regulation.
Mechanism Overview:
NAD+ participates in oxidation-reduction reactions by accepting electrons and hydrogen to form NADH. The NAD+/NADH cycle is essential to glycolysis, the citric acid cycle, oxidative phosphorylation, and other pathways involved in cellular energy production.
NAD+ also serves as a required substrate for several classes of enzymes, including sirtuins, poly(ADP-ribose) polymerases, and CD38. Through these pathways, NAD+ has been investigated for its potential role in gene regulation, DNA repair, chromatin remodeling, cellular stress responses, immune signaling, and mitochondrial homeostasis.
Structure:
Chemical Name: β-Nicotinamide adenine dinucleotide
Classification: Dinucleotide coenzyme
Molecular Formula: C₂₁H₂₇N₇O₁₄P₂
CAS: 53-84-9
Molecular Weight: ~663.4 g/mol
