"Invalid food" was still widely understood in the 1920s and 1930s as a special category of food for people with chronic conditions and those who were convalescing from illness or injury. In an era when there was still limited capacity to restore full health quickly with effective treatments, even for those who had access to the best medical attention, being an invalid was often protracted. Care at home was commonplace especially for the poor in a period of significant economic and social change. Generally, the impact of nutritional science on medical education was minimal and households often turned to mass market cookery books, newspapers, and the radio for practical advice about the preparation of meals to give some benefit to the patient, or to stimulate the appetite. By reference to period materials, this article explores the nature of that advice and the transition to more targeted publications offering a greater menu range and guidance for those preparing food.