“…Radiation treatment causes stomatitis, mucositis, esophagitis, gastroenteritis, loss of taste, nausea, vomiting, diarrhea, constipation, bleeding, and proctitis, which lead to difficulties eating and in digestion [18,19]. Malnutrition caused by radiation weakens immunity, which, in turn, increases the rate of infection, reduces the reaction to treatment, weakens the whole body, reduces quality of life, and ultimately leads to death [20,21]. …”