NAD+

NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme found in all living cells that plays essential roles in cellular energy metabolism, DNA repair, and chromatin remodeling. It functions as an electron shuttle in metabolic pathways including glycolysis and oxidative phosphorylation, helping convert food into cellular energy. NAD+ levels naturally decline with aging, obesity, and certain health conditions, which has led to research interest in NAD+ supplementation and precursor compounds.