Alice Day

Alice Day

Adelaide Medical School

Faculty of Health and Medical Sciences

Eligible to supervise Masters and PhD - email supervisor to discuss availability.

Available For Media Comment.

Dr Alice Day is an Advanced Gastroenterology Research Dietitian in the Inflammatory Bowel Disease (IBD) Translational Research Group at The Queen Elizabeth Hospital and Basil Hetzel Institute and holds an adjunct clinical position as a senior and specialist IBD dietitian. Alice has an extensive clinical background delivering gastroenterology-focused nutrition care since 2008 and completed her PhD in 2021 examining a diet as therapy for ulcerative colitis. Alice is the diet research lead within her team's broader microbial manipulation program, pioneering diet and microbial therapies for gastrointestinal diseases and establishing new clinical service care models. 
 
Dr Day is a national and international advocate and representative for gastroenterology-specialist dietitians and the value of integrating diet into the management of gastrointestinal conditions. Dr Day has been an advisor on national IBD models of care and research priorities frameworks for Crohn’s Colitis Australia, was an author on the European Crohn’s Colitis Organisation (ECCO) Consensus Guidelines on Diet and Nutrition in IBD (2025) and was been appointed the second Australian dietitian to represent southern hemisphere dietitians on Dietitians of ECCO committee (D-ECCO) for the tenure 2025-2028. Dr Day is leading an international mentoring programme for dietitians seeking support to specialised in the field of gastroenterology and is a co-founder of GI DREAM (gastroenterology dietitians in research, education, advocacy and mentoring). 

Dr Day is exploring dietary constituents that modulate colonic hydrogen sulphide and inflammation in ulcerative colitis. Dr Day’s research is significantly contributing to understanding the role of diet, the gut microbiota and production of microbial metabolites in the relapsing remitting courses of IBD. Specifically, how to use diet to engineer host microbiota to influence host microbial community and function, optimise efficacy of pharmacological therapies and use of diet strategies to engraft faecal microbiota transplantation. 

Key areas of research interest: 

1. Diet as therapy in inflammatory bowel disease

2. Diet to optimise delivery of and engraft therapies e.g. Faecal microbiota transplantation

3. Redesigning and integrating dietary services into Gastroenterology models of care

4. Disordered eating and food anxiety in gastrointestinal disorders

5. Developing novel microbial-derived biomarkers of gastrointestinal disease

  • Journals
    Year Citation
    2026 Melton, S. L., Fitzpatrick, J., Chu, M. K. W., Gkikas, K., Monro, E., Matthews, J., . . . Day, A. S. (2026). Advancing Clinical Trial Methodology and Reporting of Outcomes for Exclusive Enteral Nutrition and Partial Enteral Nutrition in Crohn's Disease: Challenges and Recommendations. JCC Plus, 1(1).
    DOI
    2025 Chu, M. K. W., Day, A. S., Broad, L., Costello, S. P., Edwards, S., & Bryant, R. V. (2025). Meta-Analysis: Exclusive Enteral Nutrition in Adults With Ulcerative Colitis. Alimentary Pharmacology and Therapeutics, 61(5), 756-775.
    DOI Scopus5 WoS5 Europe PMC4
    2025 Yao, C. K., Green, K., Day, A. S., Ardalan, Z. M., Slater, R., Bryant, R. V., . . . Probert, C. (2025). Distinct Profiles of Fecal Volatile Organic Compounds Discriminate Ulcerative Colitis Patients With an Ileoanal Pouch From Those With an Intact Colon. Molecular Nutrition and Food Research, 69(7), 10 pages.
    DOI Europe PMC1
    2025 Chu, M. K. W., Day, A. S., Broad, L., Costello, S. P., Edwards, S., & Bryant, R. V. (2025). Letter: Exclusive Enteral Nutrition in Ulcerative Colitis-The Path Ahead Needs Careful Consideration. Authors' Reply.. Alimentary pharmacology & therapeutics, 61(9), 1579-1580.
    DOI
    2025 Kamath, S., Bryant, R. V., Costello, S. P., Day, A. S., Forbes, B., Haifer, C., . . . Joyce, P. (2025). Translational strategies for oral delivery of faecal microbiota transplantation. Gut, 74(12), 22 pages.
    DOI Scopus5 WoS6 Europe PMC5
    2025 Mathias, R. M., Goodsall, T. M., Parker, C. E., Day, A. S., An, Y. K., Baraty, B., . . . Bryant, R. V. (2025). Expert Position Statement: Defining the Role of Intestinal Ultrasound in Assessing Constipation and Faecal Loading. Alimentary Pharmacology and Therapeutics, 62(8), 799-808.
    DOI Scopus3 WoS3
    2025 Svolos, V., Gordon, H., Lomer, M. C. E., Aloi, M., Bancil, A., Day, A. S., . . . Halmos, E. P. (2025). European Crohn’s and Colitis Organisation consensus on dietary management of inflammatory bowel disease. Journal of Crohn S and Colitis, 19(9), 40 pages.
    DOI Scopus5 WoS5 Europe PMC5
    2025 De Sciscio, M., Bryant, R. V., Haylock-Jacobs, S., Day, A. S., Pitchers, W., Iansek, R., . . . Kimber, T. E. (2025). Faecal microbiota transplant in Parkinson’s disease: pilot study to establish safety & tolerability. Npj Parkinson S Disease, 11(1), 6 pages.
    DOI Scopus1 WoS1 Europe PMC1
    2025 Chu, M. K. W., Day, A. S., Bogatic, D., Hatzi, M., Chu, S. K. S., Costello, S. P., & Bryant, R. V. (2025). Frequent Dietetic Involvement Enhances Adherence and Clinical Outcomes of Exclusive Enteral Nutrition in Adults With Crohn's Disease. Jgh Open, 9(7), 14 pages.
    DOI
    2025 Day, A. S., & Bryant, R. V. (2025). Letter: Diet to Modify Risk of IBD—More Plants and Less Processed Food?. Alimentary Pharmacology and Therapeutics, 62(5), 557-558.
    DOI
    2025 Portmann, L. J., Fitzpatrick, J. A., Halmos, E. P., Bryant, R. V., & Day, A. S. (2025). Looking Beyond Nutrients, How to Assess Diet Quality in an Inflammatory Bowel Disease Population—A Narrative Review. Nutrients, 17(14), 20 pages.
    DOI
    2025 Mathias, R. M., Goodsall, T. M., Parker, C. E., Day, A. S., An, Y. K., Baraty, B., . . . Bryant, R. V. (2025). Editorial: Intestinal Ultrasound for the Assessment of Constipation—Out of the Shadows? Authors' Reply. Alimentary Pharmacology and Therapeutics, 62(8), 855-856.
    DOI Europe PMC1
    2025 Day, A. S., Slater, R., Young, R. B., Wheeler, R. Z., Marcelino, V. R., Maddigan, N. K., . . . Bryant, R. (2025). Functional Profiling Demonstrates That a Sulfide-Reducing Diet Achieves Microenvironmental Targets in Ulcerative Colitis. INFLAMMATORY BOWEL DISEASES, 12 pages.
    DOI WoS1
    2025 Raja, S. S., Costello, S. P., Rayner, C. K., Day, A., Portmann, L., Uylaki, W., . . . Bryant, R. V. (2025). Examining the role of faecal microbiota transplantation for inducing remission in resistant ulcerative proctitis and distal ulcerative colitis (up-FMT).. J Crohns Colitis, 19(10), 13 pages.
    DOI
    2025 Mathias, R. M., Plush, S. L., Fairhead, E. J. S., Ngoi, B., Edwards, L., Day, A. S., & Bryant, R. V. (2025). Patients with functional gastrointestinal disorders spend less time in tertiary care when managed by a single clinician: results of a multicentre audit in South Australia. Internal Medicine Journal, 55(2), 260-269.
    DOI
    2025 Day, A. S., Ballard, T. M., Yao, C. K., Gibson, P. R., & Bryant, R. V. (2025). Food-Based Interventions as Therapy for Inflammatory Bowel Disease: Important Steps in Diet Trial Design and Reporting of Outcomes. Inflammatory Bowel Diseases, 31(4), 1121-1137.
    DOI Scopus1 WoS2 Europe PMC2
    2024 Mathias, R. M., Chu, M. K. W., Edwards, S., Day, A. S., Ma, C., Jairath, V., & Bryant, R. V. (2024). Meta-analysis: Intestinal ultrasound to evaluate colonic contents and constipation.. Alimentary pharmacology & therapeutics, 60(1), 6-16.
    DOI Scopus7 WoS7 Europe PMC5
    2024 Mathias, R. M., Chu, M. K. W., Edwards, S., Day, A. S., Ma, C., Jairath, V., & Bryant, R. V. (2024). Editorial: Sonographic assessment of colonic content-A new tool for constipation? Authors' reply.. Alimentary pharmacology & therapeutics, 60(2), 296-297.
    DOI
    2024 Melton, S. L., Day, A. S., Bryant, R. V., & Halmos, E. P. (2024). Revolution in diet therapy for inflammatory bowel disease. Jgh Open, 8(7), 10 pages.
    DOI Scopus10 WoS11 Europe PMC8
    2024 Russell, E. E., Day, A. S., Dimitroff, C., Trakman, G. L., Silva, H., Bryant, R. V., . . . Fitzpatrick, J. A. (2024). Practical application of the Crohn's disease exclusion diet as therapy in an adult Australian population. Journal of Gastroenterology and Hepatology Australia, 39(3), 446-456.
    DOI Scopus9 WoS9 Europe PMC9
    2024 Stankevicius, C., Davis, R. H., Huynh, D., Hatzi, M., Morgillo, S., & Day, A. S. (2024). Sarcopenia as a Risk Factor for Mortality in NAFLD: How Should We Diagnose It?. Journal of Digestive Diseases, 25(11-12), 645-654.
    DOI Scopus1 Europe PMC2
    2022 Day, A. S., Yao, C. K., Costello, S. P., Andrews, J. M., & Bryant, R. V. (2022). Food-related quality of life in adults with inflammatory bowel disease is associated with restrictive eating behaviour, disease activity and surgery: A prospective multicentre observational study. Journal of Human Nutrition and Dietetics, 35(1), 234-244.
    DOI Scopus33 WoS32 Europe PMC32
    2022 Day, A. S., Yao, C. K., Costello, S. P., Ruszkiewicz, A., Andrews, J. M., Gibson, P. R., & Bryant, R. V. (2022). Therapeutic Potential of the 4 Strategies to SUlfide-REduction (4-SURE) Diet in Adults with Mild to Moderately Active Ulcerative Colitis: An Open-Label Feasibility Study. Journal of Nutrition, 152(7), 1690-1701.
    DOI Scopus32 WoS34 Europe PMC29
    2021 Bryant, R. V., Day, A. S., McGrath, K. C., Telfer, K., Yao, C. K., & Costello, S. P. (2021). Fecal microbiota transplantation augmented by a sulfide-reducing diet for refractory ulcerative colitis: A case report with functional metagenomic analysis. Jgh Open, 5(9), 1099-1102.
    DOI Scopus14 WoS11 Europe PMC11
    2021 Day, A. S., Yao, C. K., Costello, S. P., Andrews, J. M., & Bryant, R. V. (2021). Food avoidance, restrictive eating behaviour and association with quality of life in adults with inflammatory bowel disease: A systematic scoping review. Appetite, 167, 16 pages.
    DOI Scopus74 WoS68 Europe PMC57
    2021 Day, A. S., Wood, J. A., Halmos, E. P., & Bryant, R. V. (2021). Practical Guidance for Dietary Management of Patients With Inflammatory Bowel Disease During the SARS-CoV2 Pandemic. Journal of the Academy of Nutrition and Dietetics, 121(2), 201-209.
    DOI Scopus1 WoS1 Europe PMC1
    2021 Davis, R., Day, A., Barrett, J., Vanlint, A., Andrews, J. M., Costello, S. P., & Bryant, R. V. (2021). Habitual dietary fibre and prebiotic intake is inadequate in patients with inflammatory bowel disease: findings from a multicentre cross-sectional study.. Journal of Human Nutrition and Dietetics, 34(2), 420-428.
    DOI Scopus20 WoS19 Europe PMC15
    2021 Day, A. S., Davis, R., Costello, S. P., Yao, C. K., Andrews, J. M., & Bryant, R. V. (2021). The Adequacy of Habitual Dietary Fiber Intake in Individuals With Inflammatory Bowel Disease: A Systematic Review. Journal of the Academy of Nutrition and Dietetics, 121(4), 688-708.e3.
    DOI Scopus32 WoS27 Europe PMC21
    2020 Day, A., Wood, J., Melton, S., & Bryant, R. (2020). Exclusive enteral nutrition: An optimal care pathway for use in adult patients with active Crohn's disease. JGH Open, 4(2), 260-266.
    DOI Scopus32 WoS32 Europe PMC26
    2020 Costello, S. P., Day, A., Yao, C. K., & Bryant, R. V. (2020). Faecal microbiota transplantation (FMT) with dietary therapy for acute severe ulcerative colitis.. BMJ Case Rep, 13(8), 3 pages.
    DOI Scopus24 WoS20 Europe PMC22

  • Conference Papers
    Year Citation
    2024 Goodsall, T. M., Day, A. S., Andrews, J. M., Ruszkiewicz, A., Ma, C., & Bryant, R. V. (2024). Composite Assessment Using Intestinal Ultrasound and Calprotectin Is Accurate in Predicting Histological Activity in Ulcerative Colitis: A Cohort Study. In Inflammatory Bowel Diseases Vol. 30 (pp. 190-195). England: OXFORD UNIV PRESS INC.
    DOI Scopus19 WoS23 Europe PMC16
    2024 Portmann, L., Bryant, R., Raja, S., Rayner, C., Telfer, K., Costello, S., & Day, A. (2024). Comprehensive dietitian-delivered dietary advice effectively achieves dietary change in adults with Ulcerative Colitis, whereas generalised written dietary advice does not. In JOURNAL OF CROHNS & COLITIS Vol. 18 (pp. I1527). OXFORD UNIV PRESS.
    WoS1
    2024 Plush, S., Burfield, K., Kumar, S., Bryant, R., & Day, A. (2024). Interdisciplinary student-led screening clinics can identify undernutrition, sarcopenia and mental health risk in ambulatory patients with Inflammatory Bowel Disease. In JOURNAL OF CROHNS & COLITIS Vol. 18 (pp. I981-I982). OXFORD UNIV PRESS.
    2024 Theron, C., Bryant, R., Bogatic, D., & Day, A. (2024). Systematic scoping review: dietary interventions for the treatment of primary sclerosing cholangitis. In JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY Vol. 39 (pp. 315-316). WILEY.
    2024 Mathias, R. M., Day, A. S., Prowse, S. J. B., Edwards, S., Pathi, R., Goodsall, T., & Bryant, R. (2024). Accuracy of intestinal ultrasound in assessing proximal constipation in ulcerative colitis: interim results from the SEE UCAC study. In JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY Vol. 39 (pp. 177-178). WILEY.
    WoS1

Dr Day's research has been internationally recognised and is recipient of multiple grants to lead dietary therapy trials for inflammatory bowel disease

Dr Day is passionate about teaching, training and mentoring, eligible to primary supervise Masters and PhD candidates. Dr Day is also leading an international mentoring programme for dietitians working in the field of gastroenterology. 

  • Current Higher Degree by Research Supervision (University of Adelaide)
    Date Role Research Topic Program Degree Type Student Load Student Name
    2024 Co-Supervisor Microbial manipulation as treatment for primary sclerosing cholangitis Doctor of Philosophy Doctorate Full Time Dr Damjana Bogatic
    2024 Co-Supervisor Exploring the use of exclusive enteral nutrition in adult patients with Crohn's disease Doctor of Philosophy Doctorate Full Time Dr Matthew Chu
    2023 Co-Supervisor Intestinal ultrasound as a novel tool to assess luminal contents in inflammatory and functional gastrointestinal disorders Doctor of Philosophy Doctorate Full Time Dr Ryan Mathias
    2023 Co-Supervisor Evaluating the inflammatory potential of dietary protein in inflammatory bowel disease Doctor of Philosophy Doctorate Full Time Miss Rachel Hannah Davis
    2022 Co-Supervisor Dietitian-first services: application of extended scope dietetics within gastroenterology services. Doctor of Philosophy Doctorate Full Time Miss Samantha Plush
Connect With Me
External Profiles