What Is NAD IV Therapy? NAD helps the body with so many processes and when its levels decrease, patients are more likely to see the impacts of aging and other chronic illnesses. Even sleep and stress levels are impacted by NAD levels in the body. Maintaining higher levels of NAD+ through IV therapy can help to: Repair damaged DNA What is NAD IV Therapy? NAD DEFINITION NAD is a coenzyme naturally found in every cell in the body that can maintain DNA integrity and reverse cellular damage. Using mitochondria it’s able to increase the length of telomeres, protective caps located at the ends of chromosomes. vin9jZ.