Certified Nutritionist vs. Registered Dietitian: Comparing Roles

What is a Registered Dietitian (RD) or Registered Dietitian Nutritionist (RDN)?

When exploring the world of nutrition professionals, you may come across terms like nutritionist vs. dietitian, leaving you wondering about their distinct roles. A Registered Dietitian (RD), also known as a Registered Dietitian Nutritionist (RDN), is a licensed expert trained to provide medical nutrition therapy, requiring extensive education and certification. In contrast, a Certified Nutritionist (CN) offers a more accessible entry point into the field, with diverse nutritionist career opportunities in health and wellness that don’t demand a medical license.

The journey to becoming an RD or RDN starts with a bachelor’s degree from an accredited institution, featuring coursework in food and nutrition sciences, biochemistry, physiology, and more. Following this, aspiring RDs/RDNs must complete an accredited dietetic internship or supervised practice program, often hosted by healthcare facilities or community agencies. Once these rigorous requirements are fulfilled, a wide array of career paths opens up, from crafting meal plans and conducting public speaking on nutrition to designing community outreach programs. Some RDs/RDNs even advance their expertise through additional education, becoming researchers or professors, or earning specialized certifications in areas like pediatric or senior nutrition. For those wondering how do you become a certified nutritionist versus a dietitian, the RD/RDN route demands ongoing credential renewal every five years and adherence to state-specific licensing laws, offering a structured yet rewarding dietitian career path.

What is a Certified Nutritionist? 

Those who simply want to provide nutritional counseling may want to consider the option of becoming a Certified Nutritionist, also known as a Certified Nutrition Consultant. 

This role requires completion of a nutrition certification program or series of certification programs, usually with the prerequisite of having a high school diploma, GED, or international equivalent. This can often be done in six months or less. In this type of program, you’ll study topics like the principles of energy balance, macro and micro nutrients, the connection between nutrition and physical fitness, the use of research in creating nutritional plans, and the identification of behaviors that may affect individual clients. 

After the coursework is complete, a number of job opportunities become available— from being self-employed as a nutritional and wellness consultant to working for food supplement distributors, corporate wellness centers, weight loss centers, health food and nutrition retail stores, health and wellness publications, schools, or community programs. 

This certification allows you to give educated nutritional guidance that might include developing nutritional plans for individual clients, creating workshops on healthy eating habits that can be presented at schools or companies, and providing support to groups with specific goals like weight loss or disease management.  

Certified Nutritionists can offer, a supervised practice program, for food and nutrition intake. Certified Nutritionists are food and nutrition experts, who are much more prone to prescribe nutrition therapy, as opposed to referring patients to an MD or pharmacist for pills. Both have their place. However, nutritionists almost always want to start with nutrition as a fuel source and framework.In general, both the certified nutritionist and the registered dietician assist people with their nutrition and wellness needs. But the paths to get to those roles differ, and which one to take is a matter of personal choice. 

Get Your Free Guide to Becoming a Holistic Nutritionist

Learn about the important role of holistic nutritionists, what it takes to be successful as one, and how to build a lucrative, impactful career in nutrition.

How to Become a Dietitian: Online Certification Courses

For those eager to dive into a dietitian career, becoming a Registered Dietitian Nutritionist (RDN) in the US offers a fulfilling path that combines academic rigor, practical experience, and professional certification. This journey is designed to provide individuals the expertise needed to provide medical nutrition therapy, develop community health programs, and guide clients toward better wellness. It’s a structured process that varies slightly by state, but the core steps—spanning education, supervised practice, and a national exam. Whether you’re drawn to clinical settings or public health outreach, the roadmap below outlines the essential requirements to launch your dietitian career path successfully.

• Complete a bachelor’s degree in nutrition or a related field from an accredited college or university. 
• Complete an Accreditation Council for Education in Nutrition and Dietetics (ACEND) accredited dietetics program, which includes coursework in food and nutrition sciences, medical nutrition therapy, foodservice systems management, and community nutrition. 
• Complete a supervised practice program, which includes a minimum of 1200 hours of supervised practice in areas such as clinical nutrition, community nutrition, and foodservice management. 
• Pass the national registration examination for dietitians administered by the Commission on Dietetic Registration (CDR). 
• Obtain any state-specific licenses or certifications required to practice as a dietitian in the state where you plan to work. 

It’s important to note that the specific requirements for becoming a dietitian may vary depending on the state where you plan to practice, so it’s a good idea to research the requirements before beginning your education and training. Additionally, it may be helpful to seek guidance from a professional organization for dietitians, such as the Academy of Nutrition and Dietetics, to ensure that you are following the appropriate steps to become a registered dietitian. 

How to Become a Certified Nutrition Specialist: Online Nutrition Courses 

 AFPA has numerous nutrition certifications for various areas of specialty, which can all be completed online and in your own time.  

One of our most popular courses is the Holistic Nutritionist Certification. This course contains information about everything from food and nutrition science to coaching methodologies. AFPA also offers the following certifications:  

You can check out all of AFPA’s courses here. 

Dietitian vs. Certified Nutritionist: Degree and Careers Comparison 

When comparing a dietitian vs. certified nutritionist, the distinctions in education, training, and career opportunities become clear, offering unique pathways for those interested in nutrition and wellness. Those following a dietitian career path typically earn a bachelor’s degree in dietetics or a related field, complete an accredited program, log extensive supervised practice hours, and pass a national registration exam to become a Registered Dietitian (RD). In contrast, certified nutritionists may also hold a degree in nutrition or a similar discipline, but their certification requirements fluctuate by state—some mandate licensing, while others require little beyond basic credentials. This variance shapes their nutritionist career trajectories.

Education and Training: 

• Dietitians typically hold a bachelor’s degree in dietetics, nutrition, or a related field, and must complete an accredited dietetics program, a supervised practice program, and pass a national registration exam in order to become a registered dietitian. 
• Certified nutritionists might hold a bachelor’s degree in nutrition, dietetics, or a related field, but certification requirements vary by state. Some states may require certification through a state licensing board or other organization, while others may not require certification at all. 

Scope of Practice: 

• Dietitians are trained to work in a variety of settings, including hospitals, clinics, schools, and long-term care facilities, and are qualified to provide medical nutrition therapy to patients with complex medical conditions. 
• Certified nutritionists may provide nutrition counseling and education to clients, but their scope of practice is more limited than that of a registered dietitian. 

Career Opportunities: 

• Dietitians may work in a variety of roles, including working as clinical dietitians, food service managers, community nutritionists, and research dietitians. 
• Certified nutritionists may work as nutrition consultants, wellness coaches, or nutrition educators, among other roles. 

In summary, while both dietitians and certified nutritionists work in the field of nutrition and wellness, dietitians typically have more extensive education and training and a broader scope of practice. On the other hand, certified nutritionists have ample opportunity to either start a business or work for a wide range of health and wellness organizations.  

What Does a Certified Nutritionist Do? 

A certified nutritionist is a healthcare professional who specializes in the study of nutrition, diet, and the relationship between food and health. Some programs include applied health behavior change theory in order to be able to provide additional coaching services. Coaches work with individuals or groups to help them make better food choices, develop healthy eating habits, and achieve specific health goals. 

Here are some of the specific tasks that a nutritionist might perform: 

• Assessing nutritional needs: A nutritionist might conduct a detailed analysis of an individual’s diet and lifestyle to determine their nutritional needs and identify any areas where they may be lacking important nutrients. Note that nutrition coaches and certified nutritionists cannot diagnose or treat conditions, and in many states, they cannot recommend supplements or medical dietary treatment of conditions.  
• Providing nutrition education and coaching: Nutritionists educate individuals about the role of various nutrients in the body, how to read food labels, and how to make healthy choices when dining out. They can also use behavior change methods to support clients in adopting a healthy relationship with food.  
• Research: Nutritionists may also conduct research to better understand the relationship between diet and health, and to develop new approaches to improving nutrition and health outcomes. 
• Collaborating with other healthcare professionals: Nutritionists often work as part of a healthcare team, collaborating with physicians, nurses, and other healthcare professionals to provide comprehensive care to patients. 

The specific tasks that a nutritionist performs may vary depending on their area of specialization and the type of clients they work with. Some nutritionists work with individuals with specific health conditions, such as diabetes or heart disease, while others may focus on working with athletes to optimize their performance through nutrition. 

What’s the Difference Between a Licensed Nutritionist and a Certified Nutritionist? 

The terms “licensed nutritionist” and “certified nutritionist” can vary in meaning depending on the state or country in which the individual is practicing. However, in general, here are the key differences between the two: 

Licensing 

In some states, the term “licensed nutritionist” is used to refer to an individual who has met specific educational and training requirements and is licensed to practice nutrition. Licensing requirements vary by state but typically involve completing a degree in nutrition or a related field, completing a certain number of supervised practice hours, and passing an exam. In these states, only licensed nutritionists are legally allowed to provide nutrition counseling services. 

Certification 

“Certified nutritionist” is a term that is often used to refer to individuals who have completed a certification program in nutrition. Certification programs vary in their requirements but often involve completing a certain number of nutrition-related courses and passing an exam. Certification is generally not required in order to practice as a nutritionist but can be a way for individuals to demonstrate their knowledge and expertise in the field. 

So… 

It’s important to note that the terms “licensed nutritionist” and “certified nutritionist” are not standardized and may be used differently depending on the specific state or country in which the individual is practicing. It’s always a good idea to research the specific qualifications and credentials of a nutritionist before seeking their services. 

What Can a Dietitian Do That a Nutritionist Cannot? 

Registered dietitian nutritionists and nutritionists share many similarities in their work, as both are trained in the study of nutrition and can provide nutrition counseling to individuals or groups. However, there are a few key differences between the two professions in terms of their training, scope of practice, and legal requirements. Here are a few things that a dietitian can do that a nutritionist cannot: 

• Provide medical nutrition therapy: Dietitians are trained to provide medical nutrition therapy, which involves developing and implementing personalized nutrition plans for individuals with specific medical conditions. This may include developing specialized diets for individuals with conditions such as diabetes, heart disease, or kidney disease, as well as providing nutrition support for individuals receiving medical treatments such as chemotherapy. 
• Work in clinical settings: Dietitians are often employed in clinical settings such as hospitals, nursing homes, and long-term care facilities, where they work as part of a healthcare team to provide nutrition care for patients. 
• Supervise food service operations: Dietitians may work in foodservice settings such as schools, hospitals, and restaurants, where they may be responsible for developing menus, overseeing food preparation, and ensuring that food is prepared in accordance with nutrition and safety standards. 
• May require licensure: In many states, dietitians are required to be licensed in order to practice. This typically involves completing specific educational and training requirements, passing an exam, and meeting ongoing continuing education requirements. 

It’s worth noting that the general term “nutritionist” is not a legally protected term in many states, which means that there are no specific educational or training requirements for individuals who use this title. As a result, the qualifications and scope of practice of nutritionists may vary widely, and it’s important for individuals seeking nutrition counseling to carefully evaluate the credentials and qualifications of the individual they are working with. 

Dietitian vs. Certified Nutritionist Career and Salary Outlook 

Dietitians and certified nutritionists both play vital roles in the nutrition field, yet their job responsibilities, educational paths, and earning potential differ. As of 2025, these professions continue to evolve with growing public interest in health and wellness, influencing their demand and opportunities. Let’s explore the updated outlook and salary insights for each.

Dietitians operate across diverse environments such as hospitals, clinics, schools, government agencies, and private practices, delivering medical nutrition therapy to address and prevent chronic conditions like diabetes and heart disease. The Bureau of Labor Statistics (BLS) projects a 7% job growth rate for dietitians and nutritionists from 2023 to 2033, slightly above the average for all occupations, driven by an aging population and increased focus on preventive care. As of May 2023, the median annual salary for dietitians in the US was $69,680, with top earners in the field surpassing $98,830, particularly in high-demand areas like outpatient care centers or federal government roles. This positive outlook shows the profession’s stability and growth potential in 2025 and beyond.

Certified nutritionists, meanwhile, also work in settings like hospitals, schools, and private practices, offering nutrition advice and counseling to support clients’ wellness goals. Unlike dietitians, their scope often excludes medical nutrition therapy unless they hold additional credentials, and certification requirements vary widely by state. As of 2025, the hourly wage range for certified nutritionists is between $34.13-$45.19 per hour. It is safe to say, however, that the salary for certified nutritionists or coaches can vary significantly within the field. This is because many certified nutritionists work in a private practice which provides high potential for growth.  

What Jobs Am I Eligible for After Completing an Online Nutrition Certification?  

The types of jobs you may be eligible for after completing an online nutrition certification can vary depending on the specific certification and your previous education and experience. Completing an online nutrition certification may help you gain knowledge and skills related to nutrition and wellness, but it may not be sufficient to qualify you for certain jobs in the nutrition field.  That being said, some jobs you may be eligible for after completing an online nutrition certification include: 

• Health coach: As a health coach, you may provide guidance and support to clients to help them achieve their health goals. This may include offering advice on nutrition, exercise, and lifestyle habits. 
• Nutrition educator: In this role, you may teach others about the importance of nutrition and how to make healthy food choices. You may work in a variety of settings, including schools, community centers, and healthcare facilities. 
• Wellness consultant: As a wellness consultant, you may provide advice and recommendations to individuals or organizations on how to improve their overall health and wellbeing. This may include offering guidance on nutrition, stress management, and exercise. 

It’s important to note that the job opportunities available to you may depend on your specific certification, level of education, and experience.  

Choose Your Own Path

In this article, we’ve outlined the education and training needed to pursue a career as a dietitian or a certified nutritionist, highlighting key distinctions between Registered Dietitian Nutritionists (RDNs) and certified nutritionists. For those eyeing a dietitian career, the path involves a bachelor’s degree, an accredited dietetics program, supervised practice, and a national exam—offering a structured route to clinical expertise. Alternatively, a nutritionist career can be more flexible, with options like the Master Level Nutrition Consultant Certification from AFPA, which equips you with comprehensive skills in holistic nutrition and wellness coaching, often requiring less rigid prerequisites depending on your state. The choice hinges on your personal goals, and we invite you to kickstart your nutrition career journey with AFPA, where leading certifications can kickstart your professional growth and help you empower others’ health.

Written by

Sasha Aparicio, M.S.

Sasha Aparicio, MS, is a Food and Nutrition Anthropologist with a BA from Tufts University, and an MS in Food and Nutrition from the University of San Carlos. Sasha is a Certified Nutrition Coach and an experienced adult educator, university professor, instructional designer, program director, content writer, researcher, and health content strategist. Over the course of her career, she has worked in international development, public health, consumer qualitative research, and nutrition program management, among others. 

Get Your Free Guide to Becoming a Holistic Nutritionist

Learn about the important role of holistic nutritionists, what it takes to be successful as one, and how to build a lucrative, impactful career in nutrition.

References: 

1. https://www.cdrnet.org/  
2. https://www.eatright.org/become-an-rdn-or-ndtr  
3. https://www.bls.gov/ooh/