Book excerpt: This evidence-based tool is a comprehensive guide to nutrition assessment and nutrient requirements of infants and children - from birth to 18 years of age. Screening and risk assessment, anthropometric assessment, health history and development, diet and feeding assessment, assessment of the family environment, and macronutrient and micronutrient requirements are covered. Includes the most recent recommendations of the Expert Committee on the Assessment, Prevention and Treatment of Child and Adolescent Overweight and Obesity.