Common questions asked by patients: What is NAD+ regenerative therapy? What is NAD therapy? How long does NAD therapy last? What is regeneration therapy? Contact Dr. Norma J Curby, ND’s practice and we can help you. We serve patients from Clayton, Cobb, Coweta, Dekalb, Douglas, Gwinnett, Henry, Fayette, & Fulton Counties in the Atlanta metropolitan area.