NMN, or β-Nicotinamide Mononucleotide, is a compound naturally found in the body and various foods, widely present in fruits and vegetables. NMN is a precursor to NAD+ (nicotinamide adenine dinucleotide), which plays a critical role in cellular energy metabolism and DNA repair. As we age, NAD+ levels decline, and NMN supplements are believed to help boost NAD+ levels, thereby supporting healthy aging and overall wellness.