Nutritional Therapy Diploma (DipION)

Study for a DipION







Our DipION, internationaly renowned as the market leading qualification in clinical practice for Nutritional Therapists, was the first course of its kind to be fully accredited by the Nutritional Therapy Education Commission (NTEC) – recognising the academic integrity and rigour of our curriculum, and the gravitas of the diploma qualification.


Our comprehensive part-time, modular course delivers up-to-date theoretical knowledge alongside rigorous clinical training to form the necessary basis of a career as a trusted, safe, effective Nutritional Therapy Practitioner with the very highest professional standards.


The course will first equip you with a comprehensive working knowledge of the components of food, and its role in human biochemistry and physiology. You will progress to learning about the importance of dietary and environmental factors and their impact on health / disease and the balancing, healing and therapeutic effects of food and nutrients based on the principles of Functional Medicine. Functional Medicine is a science-based, holistic, patient-centred approach to assessment, prevention and treatment of complex health problems and chronic disease. It aims to identify biochemical and physiological imbalances which cause health problems in the individual, and address these principally through nutrition and lifestyle management. 


The final stages of the Course will teach you the specialist and complex aspects of practice, and will require you to research, plan and reflect on how you propose to develop a successful career or business in Nutritional Therapy.


This course is also offered as an e-learning option.


See PROSPECTUS for further information. For more information please contact us.



What our graduates say:


Lisa Patient DipION, Tonic-Nutrition for Life

“The DipION course provided me with excellent training and a good knowledge base which gave me the confidence to set up my own practice, Tonic. I am based at a GP’s Medical Centre in South London and specialise in weight loss, metabolism and digestive problems. It is fascinating to work alongside the medical profession. Being a Nutritional Therapist is a challenging and rewarding career. The variety and complexity of cases is enormous and you learn something new every day.” 


Ian Marber DipION, founder of The Food Doctor group

“On graduation from the ION Diploma Course in 1999 I joined a busy practice in Harley Street. This allowed me to gain valuable experience in many areas of nutrition before establishing my own practice. My work includes preventative nutrition in areas such as cardiovascular health, children’s nutrition and, in particular, food allergies, effective weight management and digestive problems. This, plus my books, columns, clinics and Food Doctor work keeps me fully occupied.”




The Institute for Optimum Nutrition is an independent educational charity.
Registered company number 2724405, registered charity number 1013084