This article explores the complex inter-relationship between evangelicalism and the formation of an organised vegetarian movement in Britain in the period 1847–1860. As well as adding insight into existing historical research into the diet, I will comment on the potential of evangelicalism's influence to reach into various areas of society, a claim that has often been contested in the existing historiography. I will explore the manner by which religious belief interacted with medico-scientific views pertaining to diet; and how it penetrated views on the role of diet to family life.