Gut Health & Low-FODMAP Nutrition Experts
Do you enjoy your food but still struggle with gut symptoms, weight, or low energy?
Are you eating a wide variety, yet something still doesn’t feel right?
Ongoing digestive, hormonal, or metabolic symptoms are your body’s way of asking for support.
A registered dietitian can help you understand what’s happening and how to fix it.
This comprehensive nutrition programme, led by a registered dietitian in Belfast, is designed to address fatigue, feeling cold, poor sleep, low mood, low energy, and stubborn metabolic symptoms. By first identifying the root causes of metabolic dysfunction, and drawing on evidence-based guidance from an experienced dietitian and nutritionist, we then focus on restoring metabolic balance, supporting sustainable weight regulation, and promoting long-term health and wellbeing.
Gut Health & Digestive Nutrition
Our specialist gut health programmes, led by a registered dietitian, are designed to relieve ongoing digestive symptoms and restore balance. As an experienced dietitian and nutritionist, we support conditions such as reflux, IBS, IBD, SIBO, and diverticular disease. Through personalised nutrition plans and our dedicated Gut Health Course, we focus on optimising digestion, improving symptoms, and supporting long-term wellbeing.
Gut Health–Led Weight Management
We help you resolve underlying gut issues with the support of a registered dietitian in Belfast, so that you can achieve sustainable weight loss or healthy weight gain while improving overall health and wellbeing. By addressing digestion first, and working with an experienced dietitian and nutritionist, we support long-term results without restrictive or unsustainable dieting.
Personalised Dietetic Assessment
This focused package offers five hours of dedicated support from a registered dietitian. By working closely with you, we thoroughly assess your health, identify potential risks, and then create a personalised nutrition plan for prevention, optimisation, or performance. As an experienced dietitian and nutritionist, we tailor every recommendation entirely to your individual goals.
Sustainable Weight Loss Programme
Our registered dietitians use the latest evidence-based nutrition research to help you achieve safe, effective, and sustainable weight loss. Rather than relying on quick fixes, this programme focuses on long-term behaviour change, metabolic health, and tailored dietary advice, delivered by an experienced dietitian and nutritionist.
Diabetes & Blood Sugar Nutrition
This personalised nutrition programme, delivered by a registered dietitian in Belfast, supports people with pre-diabetes or type 2 diabetes, going far beyond basic management. By starting with a comprehensive dietary assessment and blood marker review, and working closely with an experienced dietitian and nutritionist, we provide ongoing dietetic support to optimise blood sugar control and improve long-term health outcomes.
Sports Nutrition & Performance
This programme includes five hours of one-to-one support with a registered dietitian specialising in sports nutrition. By first assessing your training demands and nutritional needs, we then provide tailored dietary guidance to enhance performance, support recovery, boost energy levels, and improve overall athletic wellbeing, whether you compete recreationally or at an elite level.
Specialist Cancer Nutrition Support
This personalised nutrition programme, delivered by a registered dietitian in Belfast, supports people living with or recovering from cancer. By carefully assessing your individual dietary needs, and addressing treatment-related concerns, our specialist dietitian and nutritionist develops a tailored nutrition plan to support strength, recovery, and quality of life throughout every stage of care.
30+
years of experience
About 121 Dietitian -
Gillian Killiner - Registered Dietitian
Gillian Killiner is a registered dietitian in Belfast with over 30 years of experience providing personalised, evidence-based nutrition support to individuals and organisations across the UK. After spending 12 years working as a specialist dietitian within the NHS, Gillian recognised a clear gap in care; namely, the need for detailed, bespoke dietary advice that addresses real-life health challenges. At the same time, she identified growing demand for structured nutrition services designed to improve staff health, performance, and well-being within the corporate sector. As a result, 121 Dietitian was established in 2008 to deliver expert dietetic care beyond the traditional clinical setting, combining the rigour of a registered dietitian with the practical approach of an experienced nutritionist.
Hormonal imbalances
GUT health
Preparation and surgical recovery
Disordered eating
Resistant weight loss
Weight gain
Sports nutrition
If you’ve been struggling with ongoing gut symptoms such as bloating, wind, constipation, diarrhoea, abdominal pain, or fatigue, even after GP appointments or medical tests, the 121 Dietitian Gut Health Programme, led by a registered dietitian, is designed to help.
Rather than offering a quick fix or generic gut cleanse, this evidence-based, dietitian-led gut health course focuses on identifying the root causes of digestive symptoms and supporting long-term gut health. Through self-paced learning modules, expert video guidance, and practical nutrition strategies, delivered by an experienced dietitian and nutritionist, you’ll gain the tools to reduce symptoms, restore balance, and take control of your digestive health in as little as 10 days.
For full programme details, visit our Gut Health Course page and scroll down to subscribe for a free Goal-Setting Gut Health Guide.
See Reviews From Our Clients
Dorothy Haveron
Veisha Evans
Jay Rafferty
121 Dietitian is proud to have been published in
Our Signature Programmes
We offer a range of dietitian-led gut health programmes designed to support the management of digestive symptoms while improving overall health and wellbeing. Each programme is tailored to specific gastrointestinal conditions and provides personalised nutrition guidance and practical lifestyle strategies to support better digestion and long-term gut health.
This program is for those who wish for prevention or optimization of their unique dietary needs. The journey begins with an initial 1-hour appointment, led by the brilliant Gillian Killiner RD, a highly skilled dietitian. This initial consultation sets the stage for a personalised plan to enhance your health.
This program is designed to provide four months of personalized support and guidance from our expert dietitians using the latest research. Our aim is to help you achieve your weight loss goals safely and effectively, while also improving your overall health and well-being through tailored dietary advice.
By enrolling in this program, you will receive 8 hours of personal dietetic consultation over 4 months. The initial two consultations will focus on addressing your gastrointestinal symptoms. The remaining consultations will provide tailored advice to support your weight loss journey, ensuring sustained health improvements.
This program offers a comprehensive approach to improving sports performance, diet, and overall health. By booking, you will receive five hours of personalised dietetic time with our team of experts. Our specialists will provide tailored nutritional guidance to enhance your athletic performance and overall well-being.
Immerse yourself in a transformative 4-hour program designed to cater to your unique needs. This comprehensive experience begins with an initial 1-hour appointment. Our highly skilled Specialist Dietitian will carefully assess your dietary requirements, address any concerns, and develop a tailored plan to support your health.
Consultations tailored to meet your individual needs, extending beyond the management of pre or type 2 diabetes. It encompasses diet and overall health, including personalised advice, plans, shopping lists, and recipes. The program also involves checking bloods, a further review, and continuous support to optimise your health outcomes.
A deep dive program designed to address fatigue, feeling cold, poor sleep, low mood, low energy, and low metabolic symptoms. It tackles autoimmunity and ongoing weight concerns with unparalleled success. The program integrates personalised dietary and lifestyle interventions, ensuring sustainable improvements in your overall metabolic health.
Invest in Your Health Series
We’re delighted to introduce the Invest in Your Health Series. A collection of expert-led online nutrition programmes designed to help you take control of your health with clarity and confidence.
Each programme focuses on key areas, including gut health, blood sugar regulation, and overall wellbeing. By using evidence-based nutrition guidance, the series supports sustainable, long-term health improvements, rather than short-term fixes. In addition, these online courses are led by experienced registered dietitians and are suitable for anyone seeking to improve their health through practical, personalised nutrition strategies.
To learn more, watch the video, where registered dietitian Gillian Killiner explains the Invest in Your Health Series and outlines how these online nutrition programmes can support your individual health journey.
Suffer from IBS?
We Can Change Your Life!
Up to 95% success rate
Get in touch to learn how we can support you with the new low FODMAPs diet
30+ Years Experience
Helped 1000’s of clients
One to one or online
Work with a registered dietitian in Belfast for personalised nutrition support...
You can book a secure online dietitian consultation through our portal, with a range of daytime and evening appointments available to fit around your schedule.
For those who prefer in-person support, we also offer face-to-face consultations in Belfast on Tuesday and Thursday mornings.
