NAD+ is a cellular coenzyme that’s found in every cell of our bodies. NAD+ is necessary to create adenosine triphosphate (ATP), the compound the body uses for fuel. NAD+ Cell Regenerator™ helps maintain youthful levels of NAD+ with 300 mg of NIAGEN®, the first commercially available form of nicotinamide riboside, to help fight general fatigue at the cellular level.