Yvonne is undertaking a PhD in Nutrition at The University of Manchester (Sept. 2019 – Sept. 2025). Her research project aims to develop and implement a new dietary intervention for people living with bile acid diarrhoea. Her vision is that evidence-based diet therapy will one day be available and integrated into their NHS treatment pathway.
She is a specialist dietitian who has been practicing in Oxford for 27 years. She has extensive clinical experience in helping people with nutritional and diet therapy for diseases and disorders of the gut, and is a member of the British Dietetic Association.
National voluntary work:
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Clinical guidance by the National Institute for Health and Clinical Excellence (NICE) in bile acid diarrhoea [DG44] (2021), and irritable bowel syndrome: [QS114] (2016) and [CG61] (2015)
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JLA Top 10 research priorities for irritable bowel syndrome, funded by the British Society of Gastroenterology and Guts UK (2021 to 2023)
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British Dietetic Association: Evidence-based practice guidelines for the dietary management of irritable bowel syndrome in adults (2009 to 2016)
Publications in peer-reviewed scientific journals:
Staudacher HM, Costas-Batlle C, Phillips M, Anderson S, McKenzie, YA, Lomer MCE. Dietary modifications in patients with non-inflammatory bowel disease diarrhoea: a summary of the evidence and practical considerations. Frontline Gastroenterology. June 2025. doi:10.1136/flgastro-2024-102855
McKenzie YA, Kelman L, O’Connor M, Todd C, Walters JRF, Burden S. Diet therapy (The 8x5 Diet) for adults living with bile acid diarrhoea: protocol for a feasibility randomised controlled trial. BMJ Open. 2025; 0:e097973. doi:10.1136/bmjopen-2024-097973.
French C, McKenzie Y, Stanmore E, Burden S. Are Mobile Apps Effective at Targeting Physical Activity or Malnutrition in Community-Dwelling Older Adults? A Systematic Review and Meta-Analysis. Journal of Aging and Physical Activity. 2024 Dec 20;1(aop):1-3.
McKenzie YA, French C, Todd C, Burden S. Food intolerance related to gastrointestinal symptoms amongst adults living with bile acid diarrhoea: A cross‐sectional study. Journal of Human Nutrition and Dietetics. 2024 Feb;37(1):79-93.
Black CJ, McKenzie YA, Scofield-Marlowe M, Setter P, Tarpey M, Ford AC, West H, Southey E, Thompson J, Corsetti M, Everitt HA. Top 10 research priorities for irritable bowel syndrome: results of a James Lind Alliance priority setting partnership. The Lancet Gastroenterology & Hepatology. 2023;8(6):499-501.
McKenzie YA, Sremanakova J, Todd C and Burden S. Effectiveness of diet, psychological, and exercise therapies for the management of bile acid diarrhoea in adults: A systematic review. Journal of Human Nutrition and Dietetics. 2022;35:1087–1104.
Rej A, Avery A, Ford AC, Holdoway A, Kurien M, McKenzie Y, Thompson J, Trott N, Whelan K, Williams M, Sanders DS. Clinical application of dietary therapies in irritable bowel syndrome. Journal of Gastrointestinal & Liver Diseases. 2018 Sep 1;27(3).
McKenzie YA, Bowyer RK, Leach H, Gulia P, Horobin J, O'Sullivan NA, Pettitt C, Reeves LB, Seamark L, Williams M, Thompson J. British Dietetic Association systematic review and evidence‐based practice guidelines for the dietary management of irritable bowel syndrome in adults (2016 update). Journal of Human Nutrition and Dietetics. 2016 Oct;29(5):549-75.
McKenzie YA, Thompson J, Gulia P, Lomer MC, (IBS Dietetic Guideline Review Group on behalf of Gastroenterology Specialist Group of the British Dietetic Association). British Dietetic Association systematic review of systematic reviews and evidence‐based practice guidelines for the use of probiotics in the management of irritable bowel syndrome in adults (2016 update). Journal of Human Nutrition and Dietetics. 2016 Oct;29(5):576-92.
McKenzie YA, Alder A, Anderson W, Wills A, Goddard L, Gulia P, Jankovich E, Mutch P, Reeves LB, Singer A, Lomer MC. British Dietetic Association evidence‐based guidelines for the dietary management of irritable bowel syndrome in adults. Journal of Human Nutrition and Dietetics. 2012 Jun;25(3):260-74.
Yvonne McKenzie
Tech Lead
Dr Sorrel Burden is a clinical academic in dietetics. She has worked extensively in the NHS as a clinical dietitian in gastroenterology and nutritional support. Currently, Sorrel is a Reader in Nutrition and Dietetics at the University of Manchester and works as a dietitian leading research in home parenteral nutrition on the Intestinal Failure Unit at Salford Royal Foundation Trust.
Her current research interests include nutrition in intestinal failure, preoperative nutritional support and nutrition in oncology. Sorrel has gained methodological expertise in undertaking systematic reviews, mixed methods research and using big data to answer research questions in nutrition and dietetics.
Sorrel has over 90 peer-reviewed publications and has been awarded numerous research grants from the National Institute for Health Research, Medical Research Council, charities, and industry.
Details of her research projects and publications can be found here:
https://www.research.manchester.ac.uk/portal/sorrel.burden.html
Dr Sorrel Burden
Professor of Primary Care and Community Health
School of Health Sciences
University of Manchester
Chris is Director of the UK National Institute for Health Research (NIHR) Policy Research Unit Older People and Frailty, and Lead for Healthy Ageing, NIHR Applied Research Collaboration-Greater Manchester. Until April 2022 he led the Healthy Ageing Research Group at the University of Manchester, a research group comprising some 40+ staff and postgraduates.
Chris is NIHR Senior Investigator and Fellow of the Royal College of Physicians of Edinburgh.
Chris’s work is broadly Health Services Research related to fall prevention, frailty and activity promotion amongst older people, including the use of technologies in support of interventions with older people.
Over the last 30 years Chris has been PI or CI on more than 100 grants and fellowships from funders including NIHR, MRC, NHS, EC, CRUK and various charities. Chris led the EC projects ProFaNE Prevention of Falls Network Europe; and ProFouND Prevention of Falls Network for Dissemination. He has some 300 peer reviewed research publications and been invited to speak at more than 100 international/national conferences. He has sat on numerous advisory and funding panels. Chris is an experienced PhD supervisor with 34 former PhD student, and seven ongoing including Yvonne.
Citation and publication lists: publons │ Google Scholar │ Orcid │ Scopus
https://www.research.manchester.ac.uk/portal/chris.todd.html
https://www.arc-gm.nihr.ac.uk/the-team/our-team?pag=1#content-area
Prof Chris Todd
Feasibility trial advisors
Professor Julian Walters, Professor of Gastroenterology
Division of Digestive Diseases, Imperial College London, UK
BAD UK
Michelle O’Connor, Chairman
Lawrence Kelman, IT Coordinator
Liz Smith
Acknowledgements:
BAD UK: Michelle O’Connor, Lawrence Kelman, and Kerry Laker
Advertising for participants: Lawrence Kelman and Michelle O’Connor, BAD UK; Kerry Laker and Suzanne Little of Bile Acid Malabsorption Support Group UK; Helen West, Guts UK; Marianne Williams, Patients Webinars UK
Dr Chloe French, The University of Manchester
Dr Jana Sremanakova, Nutritionist
Julie Thompson, Dietitian and Information Manager, Guts UK
The research team is also very grateful for the contributions given by those who:
-reviewed and took part in the online, UK-wide survey (2021)
-took part in the focus groups to improve the dietary intervention resources (2022)
-took part in the remote, UK-wide feasibility study (2024-2025).