What Is An FDN? What is an FDN? FDN stands for Functional Diagnostic Nutrition Practitioner. I know, it’s a mouthful. Being an FDN practitioner can change your life and your clients’ lives in profound and meaningful ways. Educate, support, inspire and help others live their best lives, while living your own best life. What FDNs … Read moreWhat Is An FDN?