THE INSTITUTE FOR OPTIMUM NUTRITION (ION) is an independent, not for profit educational charity whose purposes are:
The Institute does this by providing information in its own publications and through media contributions; by conducting various community 'outreach' programmes and events; and by providing educational courses currently ranging from the Home Study course to the Diploma in Nutritional Therapy.
At ION, we believe it is vital to cover all aspects of health, both orthodox and complementary, in order to achieve a complete understanding of the subject. Our activities focus on achieving optimum physical and mental health by a careful and thorough evaluation of an individual’s nutritional requirements.

ION is based in Richmond, south west London, and was founded in 1984 by Patrick Holford with Dr Linus Pauling as Founding Patron. Having established ION as Europe's leading provider of nutritional therapy education, Patrick then left the Institute to establish his own highly successful ventures such as the Food for the Brain charity and the Brain Bio Centre. Patrick no longer has any involvement in the running of ION.
The facilities at ION include a comprehensive library, the ION clinics - Optimum Nutrition Clinic and ION Teaching Clinic as well as the education, marketing and administrative teams that run ION.
These resources, together with an excellent reputation, makes ION one of the most respected training bodies and health information resources of its kind in the UK. ION is a member of the Nutritional Therapy Council's Schools Forum, the CMA (Complementary Medical Association) and BANT ( British Association for Applied Nutrition and Nutritional Therapy ).
Nutrition Therapy Diploma Course.
This was the first course to
specialise in all aspects of nutrition and health from both a holistic and
scientific perspective. It sets the standard for
nutritional analysis and consultation in the UK. Every year applicants for
the course exceed intake and we are immensely proud that more than 1000
graduates have now completed the ION course to become DipION Nutritional
Therapists, practising world-wide, from the UK and across Europe to New
Zealand and South Africa.![]()
ION Home Study Course. Designed for the general public and health practitioners, the ION Home Study course teaches the fundamentals of nutrition and health,
providing knowledge to empower the learner to recognise and address the dietary implications of common
health conditions, or simply for the learner to put together
an optimum diet.![]()
The ION I-Mag. Optimum Nutrition goes from strength to
strength. Every article is checked by an editorial panel and
is supported by scientific research and clinical evidence. Optimum Nutrition has addressed many hot topics from supplementation to mental health,
but also covers other useful information including clinical case histories and
healthy meal ideas, often targeted at a particular health condition.![]()
You may download some previous nutrition articles from this site.![]()
ION Membership. Members of the public and health practitioners can become members of ION, to help support and develop the organisation and to enjoy all the benefits associated with it.
See our Membership section for more information.![]()
Optimum nutrition is the medicine of tomorrow
Dr Linus Pauling, ION's Founding patron and twice Nobel Prize winner and scientist with 48 doctorates to his name
About the Website
This website aims to provide you with all the facts about ION as well as
useful health and nutrition information to enable you to understand and
implement the principles of Optimum Nutrition.
Subjects encompass: