First, cancer patients can't get enough nutrition. While cancer patients are taking in nutrition, cancer cells are also competing for nutrition, which consumes a lot of nutrition. Secondly, cancer patients have anorexia and nausea. After surgery, radiotherapy and chemotherapy, cancer patients are often accompanied by symptoms of loss of appetite, nausea and vomiting, and toxins often produced after cancer tissue necrosis will also make patients anorexia, thus reducing nutrient intake. Furthermore, the sequelae of cancer patients after treatment. For example, chronic bleeding and digestive tract obstruction caused by patients with digestive tract tumors will affect the digestion and absorption of food and the intake of nutrients.

Finally, the mentality of cancer patients. Attitude determines everything, and a person's mentality is the most important. If a person has a mortal mentality, then I'm afraid even the gods can't save him. It's best to look at it. Persisting in cancer is a good example.