Dr Zahra Kassam MB BS, FRCPC, MSc, DipABLM, is a Radiation Oncologist at the Stronach Regional Cancer Centre, and an Assistant Professor in the Department of Radiation Oncology at the University of Toronto, Canada, specialising in the treatment of breast and gastrointestinal malignancies. She is a certified Lifestyle Medicine physician with the American Board of Lifestyle Medicine and counsels her patients on dietary and lifestyle interventions to optimise outcomes after a cancer diagnosis. In 2019, she co-founded Plant-Based Canada, a non-profit organisation with the mission to promote plant-based whole food nutrition that is healthy and sustainable and which supports the well-being of the planet and all its inhabitants.

Dr Shireen Kassam MB BS, FRCPath, PhD, DipIBLM is a Consultant Haematologist and Honorary Senior Lecturer at King’s College Hospital, London, with a specialist interest in the management of lymphoma. She is also a certified Lifestyle Medicine Physician and is passionate about promoting the benefits of plant-based nutrition for the prevention and reversal of chronic diseases and for maintaining optimal health after a cancer diagnosis. In 2018 she was appointed She is Founder and Director of Plant-Based Health Professionals UK, a community interest company whose mission is to provide evidence-based education on healthy plant-based diets. In 2021 she co-founded Plant Based Health Online, the UK's first CQC-regulated, lifestyle medicine healthcare service.