Functional Diagnostic Nutrition® Health Coach Disclaimer Functional Diagnostic Nutrition® health coaches do not diagnose, treat, prevent, or cure any disease or condition. Nothing we share with our clients is intended to substitute for the advice, treatment or diagnosis of a qualified licensed physician. Functional Diagnostic Nutrition® (FDN) Practitioners may not make any medical diagnoses or claim, nor substitute for your personal physician’s care. It is the role of a Functional Diagnostic Nutrition® Practitioner to partner with their clients to provide ongoing support and accountability in an opt-in model of self-care and should be done under the supervision of a licensed physician.