Dietitian or Nutritionist? The Difference in the UK

In short: “dietitian” is a title protected by law in the UK. Every dietitian must be registered with the Health and Care Professions Council (HCPC), and dietitians can assess, diagnose and treat diet and nutrition problems, including for medical conditions. “Nutritionist” isn’t protected, so anyone can use it. Qualified nutritionists can be on the Association for Nutrition’s voluntary register and use RNutr or ANutr. Whoever you choose, check the register before you book.

If you’re looking for help with food, eating or a health condition, the titles can be confusing. This guide explains what each title means, who might suit what you need, and how to check someone before you pay.

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Please read. This is general information from us, not medical or dietary advice. If you have a health condition, or you’re worried about your eating or weight, talk to your GP first. We quote the organisations below as their websites read on 24 October 2026. Therapist Circle isn’t connected to or endorsed by any of them.

What a Dietitian Is

The British Dietetic Association (BDA) describes dietitians as “qualified and regulated health professionals that assess, diagnose and treat dietary and nutritional problems at an individual and wider public-health level” (BDA: what is a dietitian).

The BDA also says the title “dietitian” is “the only food and nutrition title that is protected by law”, and that all dietitians are regulated by the HCPC (BDA: check HCPC registration). The HCPC lists dietitian among the professions and protected titles it regulates, so using the title without being registered is against the law.

Dietitians work in NHS hospitals and community services, in GP practices, in schools and workplaces, and in private (freelance) practice. They may see adults or children.

What a Nutritionist Is

“Nutritionist” is not a protected title, so anyone can call themselves one, whatever their training. The Association for Nutrition (AfN) holds the UK Voluntary Register of Nutritionists (UKVRN), which it describes as a register of qualified nutrition professionals who meet its standards (Association for Nutrition).

The AfN says that if you’re looking for a qualified nutritionist, you should check they have RNutr (Registered Nutritionist) or ANutr (Associate Nutritionist) after their name. Registered nutritionists often work in public health, food, research, education and wellbeing roles.

Other Nutrition Titles

You may also see titles such as nutritional therapist, nutrition coach or diet coach. Because “dietitian” is the only protected food and nutrition title, none of these tells you on its own what training someone has. Ask which register they are on, if any, and check it yourself.

Which One Might Suit You

  • A medical condition that affects what you eat. If you have been told to change your diet because of a health condition, or a condition such as diabetes, a gut condition or a food allergy affects what you can eat, a registered dietitian is usually the professional to ask about. Your GP can refer you or tell you what is available.
  • Worries about eating, weight or food. If you or someone you care for is struggling with eating, start with your GP. Support for eating disorders normally begins there and can lead to a specialist service, which may include dietitians alongside other professionals such as psychologists, psychotherapists and occupational therapists.
  • A child’s feeding or growth. Talk to your health visitor or GP first. Children’s dietitians often work with speech and language therapists and occupational therapists when a child has feeding or swallowing difficulties.
  • General healthy eating. A registered nutritionist (RNutr or ANutr) or a dietitian may be able to help. Check their register either way.

How to Check Before You Book

  1. Dietitian: search the HCPC register by name or registration number, and make sure the profession shown is dietitian.
  2. Nutritionist: search the AfN register (UKVRN) and look for RNutr or ANutr.
  3. Ask what experience they have with your situation, how sessions work (in person, online or by phone), what they charge, and whether they will write to your GP if you want them to.

Our guide on how to check a register covers every UK therapy and health register in one place, and questions to ask before you book has a printable list.

How to Find One

  • On the NHS: you are usually referred by your GP, consultant or another health professional. In some areas you can refer yourself, so ask your GP practice.
  • Privately: the BDA has a Find a dietitian search for freelance dietitians. The AfN register lets you search for registered nutritionists.
  • On Therapist Circle: search for dietitians on Find. Every listing shows the practitioner’s HCPC registration so you can check it yourself. Read more in our guide to dietitians in the UK.

Common Questions

What is the difference between a dietitian and a nutritionist?

In the UK, “dietitian” is protected by law. Only people on the Health and Care Professions Council (HCPC) register can use it. Dietitians assess, diagnose and treat diet and nutrition problems, including for people with medical conditions. “Nutritionist” is not protected by law, so anyone can use it. Qualified nutritionists can join the Association for Nutrition’s voluntary register and use RNutr or ANutr after their name.

Should I see a dietitian or a nutritionist?

If you have a medical condition that affects what you eat, or you have been told to change your diet for a health reason, a registered dietitian is usually the professional to ask about, and your GP can advise. For general healthy eating information, a registered nutritionist may also be able to help. Whoever you see, check their register first.

How do I check a dietitian is registered?

Search the HCPC register online by name or registration number. Every practising dietitian in the UK must be on it.

How do I check a nutritionist is qualified?

Look for RNutr (Registered Nutritionist) or ANutr (Associate Nutritionist) after their name, and search the Association for Nutrition’s UK Voluntary Register of Nutritionists. Because the title isn’t protected, someone calling themselves a nutritionist may not be on any register.

Can I see a dietitian on the NHS?

Often, yes. You are usually referred by your GP, consultant or another health professional, and in some areas you can refer yourself. Ask your GP practice what is available locally.

Last reviewed 24 October 2026. Not affiliated with or endorsed by the BDA, the HCPC, the Association for Nutrition or the NHS.

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