β-Nicotinamide Mononucleotide (β-NMN) is an endogenous nucleotide naturally found in various fruits and vegetables such as edamame, broccoli, and avocado. It serves as a direct precursor to nicotinamide adenine dinucleotide (NAD+), a fundamental coenzyme essential for cellular energy metabolism, mitochondrial function, DNA repair, and the activation of sirtuins (longevity-associated proteins). NAD+ levels decline progressively with age, a phenomenon linked to age-related metabolic decline and cellular dysfunction. Supplementation with NMN provides a direct and effective pathway to restore intracellular NAD+ levels, counteracting age-related NAD+ depletion and promoting cellular health and vitality.