Cancer and its treatment significantly affect nutritional status, metabolism, appetite, and physical strength. Oncology nutrition plays a critical role in supporting treatment tolerance, preserving muscle mass, preventing malnutrition, and improving recovery and long-term outcomes. Nutrition care is integrated into multidisciplinary cancer management across all stages of disease.

Nutritional support during cancer treatment focuses on maintaining energy intake, managing treatment-related side effects, and preventing nutritional decline. Individualized plans support strength and resilience throughout treatment.

Weight loss and malnutrition in cancer patients are common and associated with poorer outcomes. Early nutrition intervention aims to stabilize weight, preserve lean body mass, and support immune function.

Nutrition support during chemotherapy and radiotherapy addresses altered taste, appetite changes, digestive intolerance, and increased metabolic demands.

GI cancer nutrition, including stomach, colorectal, pancreatic, and liver cancers, requires specialized dietary planning due to altered digestion and absorption.

Pre- and post-oncological surgery nutrition supports wound healing, recovery, and functional rehabilitation.

Cancer survivorship nutrition care focuses on long-term health, recurrence risk reduction, and restoration of strength and quality of life.