Book excerpt: Early Nutrition and Long-Term Health: Mechanisms, Consequences, and Opportunities, Second Edition updates and expands upon the content in the first edition and adds focus on actionable and modifiable aspects of nutrition that have an impact on long-term health and disease. Part I examines the associations and the mechanisms of early life nutrition on growth as well as the development of cognitive, metabolic, immune, and dietary patterns and behaviors. Part II reviews the associations and impact of early life nutrition on non-communicable disease as well as their societal and economic impact. Part III focuses on the dietary and nutritional needs and approaches to optimizing the different stages of nutrition, from conception to the second year of life. Nutritionists, pediatricians, academics with research interest in this area, and food industry and healthcare professionals working in infant/child product and services, as well as students studying related disciplines, will benefit from this updated reference. Examines the relation between early life nutrition and long-term health Reviews the mechanistic aspects of the impact of diet, nutrition, from conception through the first years of life, on health in later life Details the associations and the impact of early life nutrition on growth and development, cognition, immunity, metabolism, and dietary habits and patterns Addresses the relationship of early life nutrition and with non-communicable diseases, including allergies, cardiovascular diseases, metabolic conditions, and obesity, as well as approaches to curtail them Explores the current societal and economic impact and the potential for interventions to improving nutrition and health