In this episode, molecular biologist Dr. Rhonda Patrick examines one of the most significant discoveries in longevity science: the age-related decline of NAD+, the coenzyme that powers mitochondrial energy production at the cellular level. As NAD+ falls, cellular repair slows, energy diminishes, and the visible signs of aging accelerate. Dr. Patrick reviews the human and animal data on NAD+ precursors and their potential to restore what time takes away.