The number of people following a vegan diet in the UK is increasing. Eating disorder clinicians are anecdotally reporting that more of their patients with anorexia nervosa are wanting to follow a vegan diet. The relationship between veganism and eating disorders is unclear. A fictitious scenario is used to explore these issues. An approach is described that clinicians may follow to help patients to understand the potential relationship between their eating disorder and veganism. The human rights issues this involves are also explored. It is hoped that this article will make readers more aware of this complex issue and the impact it can have on engagement with services and on treatment options.