The entire point is that when a title is not a protected one,
anyone can refer to themselves or others as a 'whateverist'. There is no way of telling - without further information - whether they are a charlatan, or a reputable professional with appropriate qualifications and ethical standards.
The issue of the charlatans was sufficiently great that the non-charlatan nutritionists - who were not HCPC-registered dieticians with clinical responsibilities but who had nevertheless a high standard of nutritional knowledge and education - did not wish to be associated with the apparently-ever-increasing numbers of 'nutritionists', Who can blame them? when such characters as Gillian McKeith et al were, and still are, peddling their lies to the gullible, the hopeful and the despairing and spouting erroneous, even dangerous 'advice' on medical conditions.
A voluntary professional body has been in existence for quite some time to provide consistency of standards, recognition and accreditation of educational institutions and courses, and standards of professional ethics; this body is recognised by the NHS, major companies and so on. If someone states they are a
registered nutritionist, or uses the letters ANutr or RNutr you can check the validity of their claim on the
Association for Nutrition. The Association appears to prefer to use the terms ' Professional in Nutrition' and 'Registered Nutritionist' to the simpler term.
I have a knee-jerk reaction to people who call themselves 'nutritionists' without any further evidence of actual qualification as I have had experience of having to pick up some of the damage done to other people who have, in all good faith, paid money they could ill-afford to a so-called 'nutritionist' ...