Heidi is an accredited practising dietitian and Alfred Deakin Postdoctoral Research Fellow at Deakin University. Her PhD at King’s College London and subsequent postdoctoral work has focused on investigating the dietary management of disorders of gut-brain interaction (DGBI), including with mental illness comorbidity, and the nature and relevance of diet-induced microbiome shifts in these disorders, with the ultimate aim of developing better treatments. She has published many highly influential papers on the dietary management of irritable bowel syndrome and her research underpins clinical guidelines globally. She has also led papers that seek to enhance the rigor of clinical trial design, including on the design of control diets and of diet-microbiome trials. She serves on the Rome V Design of Treatment Trials Chapter Committee and has been the recipient of several research awards including a highly commended Early Career Research Australia Award in 2021.