How to eat and drink during chemotherapy is one of the most frequently asked questions by patients and their families. During chemotherapy, many patients have poor appetite, loss of appetite, tasteless mouth, even nausea and vomiting, accompanied by fatigue and weakness, pale or yellow face. According to Chinese medicine, most patients can be classified as having a weak spleen and stomach or a deficient spleen and stomach with cold and deficiency of both qi and blood. During this period, family members are often very anxious about the lack of nutrition; at the same time, they hope to replenish nutrition as soon as possible to strengthen the body and eliminate the damage caused by chemotherapy as soon as possible. However, there are rules on how to take supplements, and it should be done gradually. Here, we recommend the following: 1. When your appetite is poor, you should focus on a light and easily digestible diet. For example, in the three major nutrients (carbohydrates, protein, fat), carbohydrates and protein should be the main focus in the early stage, fat is difficult to digest temporarily eat less. 2, common carbohydrates for rice, a variety of pasta. 3.Protein includes meat, eggs and milk. Among them, the priority is eggs, because eggs are easier to digest and absorb. The amount of meat should be properly controlled because it is relatively difficult to digest; it is not recommended to eat beef and mutton during this period. 4. Whether you can drink milk is also a concern. First of all, it should be noted that because Han Chinese are an agricultural population, nearly half of the Han Chinese do not have the enzymes needed to digest milk in their bodies during the long-term biological evolution. Therefore, not everyone is suitable for drinking milk. Yogurt may be relatively easy to digest, but if after eating it you experience bloating, thickened tongue, and an inability to regain or more reduced appetite, then you may not be suitable for consuming milk and milk products. Even if you like to consume them, you need to control the quantity. Whether or not you can consume dairy products varies from person to person. If it is not suitable, it is important not to force it. There are many ways to supplement protein. For example: eggs, tofu and soy products, etc. 5, fat, is the usual cooking oil we eat. Fat is relatively difficult to digest, so when the appetite is very poor, eat less. For example, do not put too much oil when frying, do not eat fried food and other greasy food such as red meat. 6.Eat vegetables appropriately. 7, the amount of fruit, including fruit juice should not be too large. Whether you can consume or use how much needs to be different from person to person. If you experience gastrointestinal discomfort or even diarrhea after consumption, stop eating temporarily. Vitamin supplementation can be done through various vegetables. After the appetite begins to recover, you can gradually increase the consumption of fruits and juices. 8, during chemotherapy is not recommended to eat too much of various coarse grains, because many coarse grains are difficult to digest. You should slowly nourish your stomach with fine grains. Nutritional supplementation during chemotherapy is a gradual process, not too hasty. Various nutritional foods should be given gradually according to the recovery of gastrointestinal function. Too much haste can easily increase the burden on the stomach and intestines, resulting in slower recovery and even aggravated gastrointestinal damage, which is also known as: the desire for speed is not achieved. During chemotherapy, if there is no severe vomiting, you can also take Chinese medicine to promote faster recovery of gastrointestinal function. In addition to the above chemotherapy precautions, radiotherapy patients should also avoid warm and dry foods (cinnamon, lychee, longan, spicy and stimulating, fatty and oily, fried, etc.) and health care products such as ginseng; eat yin nourishing foods (silver fungus, water chestnut, fresh rutabaga, etc.) and health care products as appropriate. (maple bucket or dendrobium, etc.). The symptoms and signs after surgery and radiotherapy and chemotherapy are not the same for everyone. It is best to come to the doctor’s office for individualized advice on what foods and supplements are appropriate.