Shedding Light on the Risks
& Benefits of Medications
Registered Dietitian Nutritionists (RDs or RDNs)
on this page:
RDNs are trained nutrition professionals who complete an accredited, graduate-level dietetics program, finish a supervised clinical rotation, and successfully pass a national certification exam. To maintain their credential, they must participate in ongoing continuing education.
Many RDNs also earn advanced certifications in specialized areas such as gerontology (the study of aging and older adults), sports nutrition, pediatrics, kidney disease, or oncology. These specialty credentials are issued by the Commission on Dietetic Registration, which oversees the certification process for dietitians. In most states, dietitians and nutrition practitioners must also be licensed or regulated to practice.
The title “nutritionist” is unregulated in many states and does not guarantee any formal training, licensure, or certification.
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