NMN (β-Nicotinamide Mononucleotide) powder is a naturally occurring nucleotide precursor, whose core function lies in participating in the synthesis of NAD+ (Nicotinamide Adenine Dinucleotide, also known as Coenzyme I). Through this process, it regulates cellular energy metabolism and aging-related mechanisms. By converting into NAD+, it enhances cellular energy production (especially mitochondrial function), which may help relieve fatigue and improve physical performance. Meanwhile, NAD+ is a key substance for maintaining the activity of DNA repair enzymes. Theoretically, it can assist in repairing cellular damage and delay aging-related physiological decline (such as the deterioration of cognitive ability and metabolic efficiency).