Dietitian or nutritionist — what the difference actually is
"Dietitian" is a protected title in UK law, on the HCPC register; "nutritionist" is open to anybody. The title "dietitian" belongs only to people on the Health and Care Professions Council register, and using it otherwise is a criminal offence. Anybody can use the title "nutritionist", whatever their training.
That is the whole difference, and it is bigger than most people realise.
What a dietitian is
Dietitians are regulated by the HCPC. To use the title they must hold an approved degree, meet standards of proficiency, carry professional indemnity insurance and keep their registration current. You can check any dietitian's registration yourself, free, on the HCPC register — it takes about thirty seconds.
If a dietitian falls below standard, there is a statutory body that can investigate and remove them from practice. That is what "regulated" means in practice: there is always somewhere to go if something goes wrong.
Dietitians are the nutrition professionals qualified to work in hospital clinical settings, which is why hospital nutrition teams are dietitians.
What a nutritionist is
"Nutritionist" is an open title in law. It covers people with a master's degree in nutritional science and people who did a weekend course online, so the qualification behind the title is the thing to ask about.
Many nutritionists are well qualified. The Association for Nutrition runs a voluntary register (the UKVRN) with real entry requirements, and someone on it has demonstrated their qualifications to an independent body. It is voluntary, so the UKVRN is the place to check: the title itself is open to anybody.
So which do you need?
That depends on why you are looking, and it is worth saying plainly that both can be the right answer.
A dietitian is what you need if a doctor has asked you to see one, if your nutrition relates to a diagnosed condition, or if you want the regulated option.
A nutritionist may suit general healthy-eating support, sports nutrition or workplace wellbeing. If you go this route, check what qualification they actually hold and whether they are on the UKVRN.
For advice about your own care, the person treating you comes first.
What it costs
Private dietitian appointments in the UK typically run £60–£120 for a first consultation, usually 45–60 minutes, with follow-ups at £40–£70. Nutritionists vary far more widely because the training does.
Prefer the NHS?
Your GP practice can refer you to a dietitian, and some areas run self-referral for specific programmes. Waiting times vary by area, so it is worth asking your GP what is available locally.
How to check anyone's registration
- Dietitians: hcpc-uk.org → Check the Register → search by name or number
- Nutritionists: associationfornutrition.org → the UKVRN register
Both are free, public, and take under a minute. Any professional will expect to be asked, and one who objects has told you something useful.
Checked August 2026 by Daniel West, respiratory physiotherapist.