Niagen (nicotinamide riboside) acts as a highly efficient precursor that the human body converts directly into NAD+, an indispensable coenzyme present in every living cell. By boosting intracellular NAD+ supplies, Niagen helps power cellular metabolism, supports mitochondrial energy production, activates sirtuins associated with longevity, and assists with vital DNA repair mechanisms. This cellular support helps combat age-related metabolic decline, oxidative stress, and everyday fatigue, promoting overall physiological resilience.