In clinical practice, we often encounter some lung cancer patients or their family members asking how to have a more appropriate diet, whether they can eat or not, and whether all the nutrients will be absorbed by the cancer cells after eating too much. Therefore, today we will make a little popularization on this issue. Simply put, the following principles need to be mastered Balanced diet: the metabolic characteristics of tumor are different from normal tissues, and lung cancer patients are often under constant treatment, so adequate nutrition and balanced status are very important. Then the easiest way to measure the nutritional status of patients is whether they can maintain their body weight. To maintain normal weight, the best way is to maintain a balanced diet, generally consuming 200~500g of cereals, 250ml of dairy, 125~250g of meat, fish and eggs, 50g of soybeans and soybean products, 400~500g of vegetables and 100~200g of fruits daily. When choosing vegetables, it is advisable to use more colorful vegetables, cruciferous vegetables are better, if uric acid is not high, you can also match more edible mushrooms. Requirements of various nutrients: 1. Fat: Don’t think that lung cancer patients cannot eat fatty foods, which is one of the main sources of body heat base. However, the intake should not be too much and should be controlled to less than 30% of the total food intake according to the percentage of calories. A diet containing appropriate proportion of fat can reduce the symptoms of nausea, vomiting and abdominal distension of lung cancer patients. 2.Protein: Lung cancer patients should eat more food rich in high quality protein, especially high quality plant protein, and chicken, duck and fish can be eaten as long as there is no allergy. 3.Vitamins: Vitamin ACEK and other vitamins have certain auxiliary anti-tumor effects. Vitamin C is an antioxidant substance that can reduce the effect of oxidation reaction of hydroxyl group, which the human body cannot produce and needs more dietary intake, then you can consider applying the following fresh vegetables and fruits: such as green, yellow and red vegetables as well as water chestnuts, asparagus, lemon, red dates, garlic, oranges and so on. 4, minerals: macronutrients, such as calcium, sodium, potassium, etc.; trace elements, such as selenium, zinc, iodine, etc. Minerals such as selenium, magnesium, zinc, copper, iron, etc. are useful for physical improvement and help to fight cancer, so lung cancer patients can pay attention to taking them in food. Fruits like bananas are one of the good supplemental fruits for minerals. 5. During the treatment period and at the end of the disease, lung cancer patients have symptoms of indigestion such as loss of appetite, nausea and abdominal distension, so they should eat easily digestible food. Besides, if there is no contraindication, drugs like megestrol acetate can also help improve appetite and reduce the possibility of malignant disease. Finally, care should be taken not to go into dietary misconceptions: patients must often be instructed to have a variety of contraindications. However, there is often not much scientific basis for this kind of contraindication, today he says that you can’t eat this, tomorrow you say that you can’t eat that, and in the end there is simply nothing to eat. This is why it is important to avoid eating different things depending on the person and the treatment method, and not to generalize what can and cannot be eaten. For example, according to TCM theory, patients can be classified into different TCM evidence types according to their clinical manifestations, so when considering the issue of avoiding food, we should pay attention to the nature of the food and taste with the properties of the disease, using the method of hot for cold, cold for hot, cool for warm, and warm for cool, with a reasonable mix of medicine and food to arrange the patient’s diet, such issues can be specifically consulted with TCM physicians. Remember, of course, that most common foods do not require much attention to their four gases and five tastes and can be consumed normally. There is also a big misconception that cancer cells have a stronger ability to take in nutrients than normal cells, and that eating more high protein will promote the growth of cancer cells. It is important to note here that if the skin does not exist, the hair will not be attached. However, if nutrition is not enough, the immunity of human body will be at a low level and the ability to fight against cancer will be weakened, which is more conducive to the development of cancer cells. Especially for radiotherapy patients, without certain protein supply, bone marrow hematopoiesis will be difficult to recover, which will often affect the treatment. Therefore, lung cancer patients, especially during the treatment period, should not be too strict in avoiding food and not too narrow in recipes, but should mainly have a high-protein and high-vitamin diet to make up for the excessive consumption of tumor and improve the immune function, anti-cancer ability and survival quality. Therefore, lung cancer patients and their family members should remember that lung cancer has gradually become a chronic disease, so don’t be overly panic, face it frankly and make good daily diet arrangement, and you will be happy every day.