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You've probably already heard of GLP-1 medications like Ozempic taking over the market. However, there is a new and...
Last updated: February 5, 2026
Have you wondered what the difference is between a nutritionist vs dietitian? We’re here to explain! If you can remember this phrase, it’ll clear things up: all dietitians are also nutritionists, but not all nutritionists are dietitians. You know, it’s kind of how all cacti are considered to be succulents, but not all succulents are cacti.
Technically, the full title for a dietitian is Registered Dietitian Nutritionist (RDN). Some choose to use the abbreviation RDN, some just use RD. Either way, both signify a registered dietitian nutritionist. Below, we will point out the main differences between dietitians and nutritionists. We’ll start with the educational differences:
Now, we must clarify that there are some nutritionists that are more legitimate than others. We definitely don’t mean to rule out nutritionists that are not dietitians. Some of them have Ph.Ds or Master’s degrees, and they really know their stuff! For example, a certified nutrition specialist (CNS) has a certification in nutrition concentration and has been certified by the Board of Certification for Nutrition Specialists. These are the most highly qualified nutritionists besides registered dietitians. These individuals must attain:
Dietitians and nutritionists have different responsibilities depending on their environment. There are certain things that a dietitian can do that a nutritionist cannot. We’ll go over those next.
Conclusion
We hope this answered your question! When working with a patient and catering to their specific needs, it’s best to contact a dietitian for individualized advice. There is an abundance of information out there. When deciphering the right information for you, we recommend you work with a health professional like a registered dietitian. Contact us if you need any help!
Last updated: February 5, 2026
AZ Dietitians offers in-person and virtual appointments for Arizona clients. Now offering telehealth services for clients in Colorado, Utah, and California.
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