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 25 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: 

• 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)

• JLA Top 10 research priorities for irritable bowel syndrome, funded  by the British Society of Gastroenterology and Guts UK (2021 to 2023)

• British Dietetic Association: Evidence-based practice guidelines for the dietary management of irritable bowel syndrome in adults (2009 to 2016)

Publications: 

McKenzie, Y. A., French, C., Todd, C., & Burden, S. (2024). Food intolerance related to gastrointestinal symptoms amongst adults living with bile acid diarrhoea: A cross‐sectional study. Journal of Human Nutrition and Dietetics, 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, Y. A., Sremanakova, J., Todd, C., & Burden, S. (2022). 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.

McKenzie Y.A., Bowyer R.K., Leach H., Gulia P., Horobin J., O'Sullivan N.A., Pettitt C., Reeves L.B., Seamark L., Williams M., Thompson J. & Lomer M.C.E. (2016) 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. 29, 549–575.

McKenzie Y.A., Thompson J., Gulia P. & Lomer M.C.E. (2016) 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. 29, 576–592. 

McKenzie, Y. A., Alder, A., Anderson, W., Wills, A., Goddard, L., Gulia, P., Jankovich, E., Mutch, P., Reeves, L. B., Singer, A., Lomer, M. C. E. and on behalf of Gastroenterology Specialist Group of the British Dietetic Association (2012), British Dietetic Association evidence-based guidelines for the dietary management of irritable bowel syndrome in adults. Journal of Human Nutrition and Dietetics, 25, 260–274. 

Rej, A., Avery, A., Ford, A.C. et al. (8 more authors) (2018) Clinical application of dietary therapies in Irritable Bowel Syndrome. Journal of Gastrointestinal and Liver Diseases, 27 (3), 307-316.