NMN (Nicotinamide Mononucleotide) is a naturally occurring compound found in living cells. It is a direct precursor to NAD+ (Nicotinamide Adenine Dinucleotide), a crucial coenzyme involved in energy metabolism, DNA repair, and cellular aging. As NAD+ levels decline with age, supplementing with NMN may help boost NAD+ production, potentially supporting vitality, metabolic health, and healthy aging.