Face to face consultation - your health is your wealth


Belfast Business Awards - highly commended

About 121 Dietitian

121 Dietitian was founded in 2009 by UK leading Dietitian Gillian Killiner to provide tailored nutritional advice and services to clients and the corporate sector. After spending 12 years in the NHS as a specialist Dietitian, Gillian realised there was a need to offer patients detailed bespoke advice and offer businesses a way to improve staff well-being.

The tailored advice provide is reassuring in a world that revolves around fad diets and conflicting inaccurate information. The 121 Dietitian team are acutely aware of how multiple factors impact on health, and thus always have their clients; dietary, health, economic and well-being interests at heart. They not only provide this unique nutrition service in Belfast but also world-wide and they won an award back in 2010 for being so innovative!


121 Dietitian’s award winning nutritional consultants not only provides personalised specialist advice on diet and health, but they also analyse blood test results to ensure nutrient levels are optimal determining the most appropriate programme for each individual.

The key areas we specialise in our Dietetic clinics Belfast and beyond, but not limited to include:


  1. Because we know how frustrating it can be to decipher the good nutrition messages from the bad.
  2. We know conventional medicine isn’t for everyone. Many people struggle with their health day to day with no answers. We can help those people by looking at improving symptoms from cellular level up.
  3. Gillian herself has beaten chronic illness with a combination of medical and nutritional knowledge.
  4. Our nutritional/medical combination approach delivers proven results.
  5. We do the science so you can EAT the REWARDS!!

Did you know?

We include how to shop healthily while tackling those food bills, tasty cost-cutting healthy lunch ideas, recipes for convenience and much more… we treat the whole person.

Gillian Killiner RD

Gillian Killiner - 121 DietitianGillian grew up and studied in London, she successfully secured a prestigious research post in Nutrition and Heart Disease with the World Health Organisation (WHO).

Gillian qualified with a Masters Degree (MSc.) in Human Nutrition and Dietetics from the University of Ulster, Northern Ireland 1997.

Her specialist training was in The Charter Mark award winning Dietetic Department at Guys and St Thomas’ Hospital, London. Her successful career spans throughout Hospitals in Northern Ireland, specialising in; Respiratory, Cancer and Haematology.

After starting a family in Northern Ireland, Gillian decided to set up her Dietetic Consultancy Service in Belfast to be able to blend her wealth of knowledge with family life.

Gillian fully understands about restrictions people face in their lives, as her mother was diagnosed with multiple sclerosis when she was aged just 5. Gillian herself has Hashimoto’s, an autoimmune thyroid condition that she successfully manages medically and nutritionally and now helps and guides others.

Reducing your carbon footprint


As well as benefiting from our advice and nutrition plans, you will be pleased to find that by becoming a 121 Dietitian client and using this service you will potentially reduce your carbon footprint.

Assisting the environment due to this paperless system and the redundancy of transport helps not only benefit you, but the world around us too.

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