Registered Nutritionist or Nutritional Therapist? Why the Difference Matters

A Registered Nutritionist and a nutritional therapist are not the same thing, even though the titles sound almost identical. They are registered by different bodies, trained in different ways and work from different starting points.

When you are choosing someone to guide your own or your children's eating, it helps to know which is which. This guide explains the difference in plain English and shows you how to check anyone's registration in under a minute.

The short answer

Yes, there is a difference. A Registered Nutritionist (RNutr) is registered with the Association for Nutrition and works from nutrition science and public health evidence. A nutritional therapist practises a form of complementary medicine and, if registered, is listed with a complementary-therapy register such as the CNHC.

In the UK, the plain words "nutritionist" and "nutritional therapist" are not protected by law. Anyone can use them, whatever their training. That is why the word registered, and who holds the register, matters so much.

What is a Registered Nutritionist?

A Registered Nutritionist gives evidence-based guidance on how food and nutrition affect health, for individuals and for whole communities. People on the UK Voluntary Register of Nutritionists, held by the Association for Nutrition (AfN), use the title Registered Nutritionist (RNutr). The title is not protected by law, and BANT uses a similar title for its own register (see below), so it is always worth checking which register someone is on.

To register, a nutritionist needs:

• A university degree (required): a 3–4 year honours degree in nutrition science, or a 1-year postgraduate programme (master's), accredited by the AfN.
• Experience: for full RNutr status, at least 3 years of practice, shown in a portfolio and assessed against the AfN's competencies.
• A specialism: registration is in a named area, such as Public Health, Nutrition Science, Food, or Sports and Exercise.
• Ongoing standards: a code of conduct and continuing professional development.

Recent graduates register first as Registered Associate Nutritionists (ANutr) and usually work under supervision while they build towards RNutr. Registered Nutritionists work in the NHS, public health, universities, government, charities, the food industry and private practice.

From the first year at university to full RNutr status usually takes at least six years: three or four years of study, then at least three years of practice before the portfolio assessment. Since January 2026, UK graduates can only join the register as an Associate through an AfN-accredited degree (see the list of accredited degrees). Employers usually expect nutritionists to be registered with the AfN, according to the graduate careers service Prospects.

What is a nutritional therapist?

Nutritional therapy is classed as a complementary therapy: it is one of the therapies on the CNHC register. Nutritional therapists usually work one-to-one with clients, looking for possible nutritional imbalances and how they may relate to a person's symptoms.

A nutritional therapist does not need an academic degree. Training is a course that meets the National Occupational Standards for Nutritional Therapy, which the AfN describes as equivalent to a level 5 diploma, below a bachelor's degree. Since September 2020, BANT has asked new full members for bachelor's-level (level 6) training, but that is a rule of the association, not of the law. Because the title is not protected, someone with no training at all can still call themselves a nutritional therapist.

Nutritional therapists can choose to join a voluntary register. The main one is the Complementary and Natural Healthcare Council (CNHC), which also registers therapies such as aromatherapy, reflexology and reiki. Their professional body is usually BANT, the British Association for Nutrition and Lifestyle Medicine.

A consultation often includes a detailed case history, a personalised food and lifestyle plan, and sometimes supplements or functional laboratory tests. BANT states that its practitioners do not diagnose or treat disease. The British Dietetic Association notes that some nutritional therapy draws on complementary approaches with little robust scientific evidence.

Side by side

Two more titles you may see

Dietitian. This is the only nutrition title protected by law in the UK. A dietitian must be registered with the Health and Care Professions Council (HCPC). Dietitians can assess, diagnose and treat diet-related medical conditions, and most people see one through an NHS referral.

"BANT Registered Nutritionist". BANT keeps its own register of nutritionists, separate from the AfN's. It is easy to confuse with RNutr, but it is a different register with different entry routes. If someone says they are a "registered nutritionist", it is fair to ask: registered with whom?

Titles such as "nutrition coach", "nutrition consultant" or "diet expert" carry no registration at all.

Nutrition First: a Registered Nutritionist, not a nutritional therapist

Nutrition First is led by Elizete Reis-Bennett, a Registered Nutritionist with four years of university study behind her (a First-class science degree and a master's from King's College London) and NHS experience. She is not a nutritional therapist, and her advice follows the scientific evidence.

Many practitioners in London advertise as nutritional therapists. That is a legitimate choice, but it is a different training and a different register. When you compare who to see, compare like with like.

How to check who you are seeing

For the full list of questions and every register in one place, see Check your nutritionist.

1. Look for the letters. RNutr or ANutr means AfN registration. RD means an HCPC-registered dietitian.
2. Ask "registered with whom?" A professional should answer straight away and give you a registration number.
3. Search the register yourself. It takes under a minute: the AfN register for nutritionists, the HCPC register for dietitians, the CNHC register for nutritional therapists.
4. Ask what their advice is based on. A good practitioner can explain the evidence behind what they recommend, especially for children, pregnancy and long-term conditions.
5. Keep your GP in the loop if you have a medical condition or take medication.

Membership of a professional association is not the same as being on a register. A register exists to protect the public and can remove people who break its standards; an association exists to support its members.

Sources

• Association for Nutrition: Nutrition Professions Comparative Summary (updated April 2024)
• British Dietetic Association: What are the differences between dietitians and nutritionists?
• BANT: Registered Nutritional Therapy Practitioners