To become a registered dietitian nutritionist (RDN), you now need a graduate degree to be eligible for the national registration exam, along with completing an ACEND-accredited program and a period of supervised practice. After passing the exam from the Commission on Dietetic Registration, most states also require a license. From high school, plan on roughly six years of college and supervised training.
What dietitians do all day
- Clinical: hospital and long-term care dietitians assess patients, plan medical nutrition therapy, manage tube feeding and work with doctors and nurses on conditions like diabetes, kidney disease and cancer.
- Outpatient and private practice: one-on-one counseling for chronic disease, digestive conditions, eating disorders (with a treatment team), pregnancy and sports performance.
- Community and public health: nutrition programs for families, schools and older adults.
- Food service management: running menus, budgets, safety and staff for hospitals, schools and large kitchens.
- Industry and research: product development, communications, research and teaching.
Expect lab values, charting and a lot of patient education. It is science work delivered through conversation.
The graduate degree requirement
Since the start of 2024, eligibility for the registration exam requires a graduate degree. The degree does not always have to be in nutrition, but most students earn a master’s in nutrition or dietetics through a program that combines coursework and supervised practice. Common routes:
- Graduate coordinated program: a master’s with supervised practice built in, finishing ready for the exam.
- Didactic program plus dietetic internship: a bachelor’s-level didactic program in dietetics, then a separate internship, with the graduate degree earned before or alongside it.
- Newer competency-based programs: graduate programs that blend coursework and practice experience in one track.
Pick a program accredited by ACEND (the Accreditation Council for Education in Nutrition and Dietetics), or the exam is off the table. Our guide on whether grad school makes sense helps you think through cost and timing.
Exam and licensing in general terms
Graduates take the registration exam for dietitians, a computer-based test. Passing earns the RD or RDN credential, which is kept current with continuing education. Most states license or otherwise regulate dietitians, and some protect the title dietitian or nutritionist. Requirements vary by state, so check your state licensing board. Note that the word nutritionist alone is often unregulated, which is why the RDN credential carries weight with employers.
Step by step from high school
- Take biology, chemistry and any nutrition or food science course offered.
- Choose a college major in nutrition and dietetics, or a science major with the right prerequisites. See what you can do with a health science degree and what you can do with a biology degree.
- Keep chemistry and biochemistry grades strong; they matter for graduate admissions.
- Get food and health work experience: hospital food service, a community food program or a diet tech job.
- Apply to graduate programs that include supervised practice, or plan your internship match carefully.
- Finish the program, pass the registration exam and apply for your state license.
Ways to test the fit
- Shadow a hospital dietitian for a day and watch how much time goes to charting.
- Request informational interviews with dietitians in clinical, sports and community roles.
- Take an intro nutrition course and a chemistry course in the same term. If you like both, that is a good sign.
- Look at a shorter route first: the nutrition and dietetics technician, registered (NDTR) credential lets you work in the field sooner and test your interest.
Who thrives and why some leave
Dietitians who do well like science and people equally, are patient with behavior change and enjoy explaining complex ideas plainly. People switch out because of the long training, competitive internship placements, and frustration when patients cannot follow plans. Many shift settings rather than leave, moving from clinical to outpatient, sports or management. Check the Bureau of Labor Statistics Occupational Outlook Handbook for current pay and outlook.
Career changers
Career changers with a bachelor’s in another field can complete prerequisite science courses and enter a graduate program with supervised practice. Fitness professionals, nurses and chefs often bring useful experience; compare with personal training if you want a faster start. Our career change guide covers planning around work.
Where a mentor helps
A mentor helps you plan prerequisites, compare graduate options, track application deadlines and stay steady through supervised practice and exam prep. Mentors are not credentialed career counselors, admissions counselors or licensing experts; they help you do the research and the work yourself. Explore career and education mentoring and mentoring for college students.
Related
- Career paths: all career guides
- How to become an athletic trainer
- What can you do with a public health degree
- What can you do with a kinesiology degree
- How to Become a Medical Assistant: Training, Credentials and Jobs
Common questions
Do you need a master’s degree to be a dietitian?
Yes, a graduate degree is now required to be eligible for the national registration exam. You also need to complete an ACEND-accredited program and supervised practice.
What is the difference between a dietitian and a nutritionist?
A registered dietitian has completed accredited education, supervised practice and a national exam. The title nutritionist is unregulated in many states, so training can vary widely.
How long does it take to become a registered dietitian?
From high school, it usually takes about six years, including a bachelor’s degree, a graduate degree and supervised practice. Some combined programs shorten the timeline.
Can I work in nutrition before becoming an RDN?
Yes. Roles like diet aide, food service work and the NDTR credential let you gain experience while you plan the full path.
Get started
Interested in nutrition and want a clear plan for the graduate route? Call (888) 305 5422, email contact@blackburnmentoring.com or start with a short assessment. A member of our team reviews every assessment personally and sets up a free intro call.