Public Health Nutrition: A Global Perspective is a comprehensive textbook for students and practitioners of public health, nutrition science, and global health, offering a rigorous yet accessible introduction to one of the most consequential and fastest-evolving fields in global health today. Spanning thirty-three chapters across eight parts, the book moves from the biological foundations of nutrition through the social, economic, and political forces that shape who eats well and who doesn’t, across the full arc of the human life course from the first 1,000 days of life through adolescence, adulthood, and older age. Drawing on the latest evidence from the World Health Organization, UNICEF, the Lancet Nutrition Series, and leading global health institutions, the book confronts the field’s central challenge head-on: malnutrition today means both hunger and obesity, often within the same family, the same community, even the same person across a lifetime. Each chapter opens with a real-world case study and closes with discussion questions designed for classroom use, making this both a serious scholarly resource and a genuinely teachable text. Written by Dr. Zerai Hagos, Associate Professor of Global Health and Clinical Studies at EUCLID (Euclid University), this book is an essential resource for anyone preparing to do the work of building a world free of malnutrition in all its forms.