This module explores the nutritional management of stomach and esophageal cancers, focusing on malnutrition, weight loss, cachexia, and treatment-related nutritional challenges. It covers protein and energy requirements, micronutrient monitoring, and practical dietary strategies for managing dysphagia, nausea, vomiting, early satiety, diarrhea, and dumping syndrome. The module also addresses texture modification, food safety, and individualized meal planning to support weight maintenance, lean muscle preservation, treatment tolerance, and recovery. Emphasis is placed on early nutritional screening and appropriate dietary intervention throughout the cancer care journey.