<p>Parenteral nutrition is a specialized nutritional method for patients undergoing cancer treatment. It is used when patients struggle to eat due to side effects from chemotherapy or radiation. This method delivers nutrients directly into the bloodstream, bypassing the digestive system. Improving nutritional status before to surgery is crucial since malnutrition is linked to poor surgical outcomes. According to the univariate analysis, cancer therapies were the factors most strongly linked to shifts in the trend over time for role, emotional, and physical functioning. When enteral nutrition is insufficient or impractical for eligible cancer patients with chronic impairments in dietary intake or absorption, current recommendations prescribe home parenteral nutrition. The purpose of this review was to discuss how applied enteral nutrition affects cancer patients’ quality of life based on the findings of randomized controlled trials. This study indicates a possible survival benefit of CN treatment in metastatic cancer and emphasizes the need to enhance the evaluation of nutritional status in oncologic patients. Alongside interdisciplinary team members, this entails educating patients and caregivers on the immediate and long-term nutritional effects of planned treatments. Nutrition support can be administered orally, enterally, or parenterally, and dietitians are in charge of recommending, providing, and monitoring it.</p>