This book investigates the complex relationship between human dietary needs and wants, exploring the biological and psychological factors that shape our eating habits. John Yudkin, a renowned physiologist and nutritionist, draws upon decades of research to present a comprehensive analysis of how modern diets diverge from our evolutionary requirements, leading to widespread health issues. He argues that understanding these fundamental differences is crucial for developing sustainable and healthy eating patterns.

John Yudkin's work on diet and health has historically been influential, particularly his earlier research on sugar. This book, 'Diet of Man, Needs and Wants,' likely continues his critical examination of contemporary eating habits, contrasting them with fundamental human nutritional requirements. The authority perspective suggests a text grounded in scientific inquiry, aiming to inform readers about the biological underpinnings of diet and the societal factors that often lead to unhealthy choices.