What’s the Difference Between a Dietitian and a Nutritionist?

Dietitian. Nutritionist. Nutrition coach. Wellness expert.

There are a lot of titles in the nutrition world, and from the outside, it can be hard to know what any of them actually mean.

The short answer: dietitian and nutritionist aren't necessarily the same thing. And the biggest difference is the training and credentials behind the title.

What makes someone a dietitian?

A Registered Dietitian (RD) or Registered Dietitian Nutritionist (RDN) has completed a standardized education and training path before earning that credential.

In the U.S., that currently includes graduate-level education, accredited coursework and supervised practice, passing a national registration exam, and completing ongoing continuing education.

That training covers everyday nutrition, but it also goes much deeper into the science behind food and the body. Dietitians are trained in medical nutrition therapy, which means they can use evidence-based nutrition interventions as part of managing certain health conditions.

You'll find dietitians in hospitals and private practices, but also in schools, sports, research, food companies and plenty of places you might not expect.

So, what is a nutritionist?

This is where things get a little less straightforward.

“Nutritionist” is a much broader title, and what it means can vary depending on where you live and the credentials of the person using it.

Some nutritionists have advanced degrees and extensive training. Others may have completed a certification or shorter training program. In some states, use of certain nutrition-related titles or services is regulated, while in others the rules are different.

So someone calling themselves a nutritionist isn't automatically qualified or unqualified. The title by itself just doesn't tell you enough.

You have to look at the person behind it.

The easiest way to think about it

An RD or RDN tells you that someone has completed a specific, nationally standardized path to earn that credential.

“Nutritionist” doesn't point to one single training path, so it's worth looking a little further into someone's education, credentials and experience.

And yes, those letters after someone's name actually mean something.

When might you want to work with a dietitian?

You don't need to have a medical condition to benefit from working with a dietitian. We work with everything from everyday eating and sports performance to pregnancy, postpartum and helping people feel more confident around food.

But having an RD or RDN can be particularly important when food and nutrition overlap with your health — things like diabetes, gastrointestinal conditions, cardiovascular health, kidney disease, food allergies, nutrient deficiencies, eating disorders or other situations where individualized medical nutrition therapy may be appropriate.

The right professional also depends on what you're looking for, and your healthcare provider can help point you in the right direction when medical care is involved.

A few things worth looking for

Whatever title someone uses, take a minute to understand what's behind it.

What education and training have they completed? What credentials do they hold? Do they have experience in the area you're looking for help with? Are they clear about what falls within — and outside of — their scope?

And pay attention to how they talk about food.

Nutrition shouldn't be built around fear. Be wary of anyone who makes sweeping promises, turns individual foods or ingredients into villains, or makes eating well feel like an increasingly long list of things you aren't allowed to have.

Food doesn't need another rulebook.

There's more nutrition information available to us than ever, but more information hasn't necessarily made eating feel any simpler.

Credentials are one way to help sort through some of that noise. They tell you something about the education, training and standards behind the person giving you advice.

But ultimately, good nutrition guidance should do more than tell you what to eat. It should help you understand why, make informed choices for yourself, and find an approach to food that actually works in your life.

That's always been the kind of nutrition I believe in.