Dr Sebastian Zeki is a distinguished gastroenterologist at St Thomas' Hospital in London, one of the UK's leading tertiary referral centres. He also serves as a senior clinical lecturer at Kings College University and Barts Cancer Institute. Dr Zeki is dedicated to making the patient experience in gastroenterology as comfortable as possible, ensuring swift resolution of symptoms and illnesses.

Dr Zeki graduated in medicine from Cambridge University and University College London in 2001. He completed his postgraduate medical training in London, during which he earned a PhD on the genomics of oesophageal cancer. His research has been recognised at national and international meetings, earning several prestigious awards.

With extensive experience, Dr Zeki specialises in the detection, accurate diagnosis, and treatment of various gastroenterological conditions, from reflux to endoscopic cancer resections. His primary research interests include upper gastrointestinal cancer diagnosis and therapy, as well as the detection of their precursors. He is also actively involved in research on food allergies and their impact on the gut, including conditions like eosinophilic oesophagitis and acid reflux-related disorders.

Dr Zeki's clinical expertise encompasses a wide range of procedures, including upper gastrointestinal endoscopy, therapeutic endoscopy, radiofrequency ablation, and endoscopic mucosal resection. He treats conditions such as Barrett’s oesophagus, oesophageal cancer, gastroesophageal reflux disease, and dysphagia. Appointed in 2015, Dr Zeki continues to contribute significantly to both clinical practice and medical research.