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Gillian Killiner

Specialist Dietitian

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Gillian grew up and studied in London. In 1993, while studying for her BSc.(Hons) Food Science Degree in London Gillian successfully secured a prestigious research post in Nutrition and Heart Disease with the World Health Organisation (WHO) in Belfast.

Gillian Killiner is an award-winning, world-renowned Specialist Consultant Dietitian with 25 years’ experience treating 1000’s of people from 0-100+.

She 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, Gastroenterology, Paediatrics, Cancer and laterly the Lead Specialist Dietitian for the Regional Haematology Unit at BCH.

She treats all aspects of Diet and Health and has been the resident Dietitian here at Kingsbridge Private Hospital for 12 years.

She is uniquely skilled in combining her extensive nutritional knowledge in all areas of medicine, health and wellness, paediatrics, and sport performance optimisation.

Gillian trained in Guys and St Thomas’ Hospital before settling in Belfast and she has covered every speciality in her 12 years in the NHS with a specialist post in Haematology. 

Gillian has worked with all levels of athletes optimising their diet, lifestyle, and performance. Her clients include NI commonwealth team members and Olympians.

Gillian’s programmes are designed specifically for each individual and based on many important pieces of data that are collected, tracked, and improved to ensure you are optimal from top to toe!

Gut health is one of her specialist areas fixing the most complex to the most common – her programmes assist patients with diarrhoea, constipation, bloating, coeliac, ulcerative colitis, Crohns, allergy, food intolerances.

Weight and resistant weight loss can be so upsetting and linked to many issues including hormones, medication, previous illness etc these can be assessed and addressed at Gillian’s clinic.

Gillian is highly skilled at treating eating disorders and in addition Long COVID is an area that Gillian has now been seeing and treating since May 2020.

Gillian's programmes assist: resistant weight loss, diabetes, heart disease, autoimmune conditions, mental health issues, eating disorders, gut health imbalances, female health, child nutrition, sports optimisation to name a few..

Personal profile

Gillian is married, has 3 children, and has a crazy rescue collie dog that she runs with daily keeping her fit! She appreciates all aspects of life as her mother has lived with MS since Gillian was 5 years old. Gillian herself after her 3rd pregnancy became ill with an autoimmune disease– her many skills allowed her to put this successfully into remission and get back to full health.

Gillian loves to cook, eat, and enjoys the outdoors. Travelling is a highlight, and she has been fortunate to see some interesting places.


MSc. Human Nutrition (1997)

BDA 5787 & CPSM DT 06877 Registration 

Post Graduate Diploma in Dietetics (SRD) (1995 - 1996)

University of Ulster, Coleraine, Northern Ireland - Pass with Commendation.

BSc. (Hons) Food & Consumer Science (1991 - 1995)

University College, London - 2:1

Treatments and areas of interest

  • Irritable Bowel Disease, FODMAP (KCL q.2011), Coeliac, IBD, malabsorption, food intolerance
  • Health and Well-Being - fatigue, diet/nutrient assessment, inflammatory/auto-immune conditions
  • Sports Nutrition at all levels (pro- athletes: cyclists, golfers, motorsports, triathletes)
  • Weight Management programmes - for health benefits or specific conditions: Diabetes, fertility, orthopaedics, pre-surgery
  • Corporate - staff performance and productivity

Kingsbridge No.6 Lisburn Road
6 Lisburn Rd, Belfast, BT9 6AA

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028 9066 7878
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Gillian Killiner's Services

At our Belfast location
Dietitians & Weight Loss
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