This module covers the science of obesity and weight management, including the role of metabolism, hormones, genetics, lifestyle, stress, and adaptive thermogenesis in weight regulation. It explores different patterns of obesity, including nutritional, hormonal, genetic, visceral, subcutaneous, sarcopenic, and psychological obesity. The module also focuses on comprehensive client assessment, sustainable weight-management strategies, NEAT, sleep, medications, and other lifestyle factors influencing body composition. It provides a holistic approach to understanding obesity and developing individualized nutrition and lifestyle interventions.