I have read a “food therapy for health” post: “Eight cancers, eight death-free medals”, claiming that the “death-free medal” for stomach cancer is garlic, the “death-free medal” for liver cancer is mushroom, the “death-free medal” for pancreatic cancer is cauliflower, the “death-free medal” for lung cancer is spinach, etc. The “gold medal” for stomach cancer is garlic, for liver cancer is mushrooms, for pancreatic cancer is cauliflower, for lung cancer is spinach, and so on. Is it possible to prevent stomach and liver cancer or even treat tumors by chewing garlic and eating mushrooms and relying on a few home-cooked vegetables? Perhaps many forwarders are of this mindset: “a little belief, a little doubt, more than hope that this is true, for health I forward, anyway, eat it is not bad.” Compared with many tumor prevention and treatment methods which are laborious, tedious, costly, ineffective and have great side effects, who doesn’t hope that ordinary vegetables and fruits are really the tumor bane and “death knight”? Unfortunately, the answer is very scenic, good intentions cannot replace scientific conclusions, which is where scientific workers are strict and disgusting. For diet and tumor, the current medical view is that there is no evidence to prove that a certain diet therapy can play an anti-tumor efficacy; however, a good nutritional status can help tumor patients reduce the occurrence of complications and improve the quality of life. Specifically on the relationship between fruits and vegetables and tumors, the 2012 American Cancer Society Guidelines on Nutrition and Exercise for Cancer Survivors (CA CANCER J CLIN 2012, 62(4):242-274) contains a detailed and objective statement that eating more nutritious fruits and vegetables may be beneficial in preventing certain specific types of tumors, reducing recurrence rates and improving survival rates. However, it is unclear exactly which components of fruits and vegetables are most protective for oncology patients, and the best approach is to consume a wide variety of colored vegetables and fruits. The guidelines also provide very specific recommendations for oncology patients: 2 to 3 glasses of vegetable juice and 1.5 to 2 glasses of fruit juice per day. In other words, there is no food that is “immune to death” for tumor patients. Vegetables and fruits are indeed beneficial to tumor patients, but the correct way to consume them is not to select one or two kinds of vegetables unilaterally, but to enrich the variety of fruits and vegetables consumed and ensure sufficient intake. One is a beautiful conjecture post that lacks objective basis, and the other is a medical guideline made by many professionals through a lot of clinical research and scientific statistical analysis of data. There are many misconceptions about the diet of tumor patients, such as “the more you eat, the faster your tumor will grow”, “if you eat less, you will starve your tumor cells to death”, etc. Some patients are afraid of eating and strictly “avoid eating” because of this. “Therefore, some patients are afraid of eating and strictly avoid eating. In fact, regardless of the amount of diet and nutrition, tumors grow by their own rules. Even if patients don’t eat or drink, tumor cells will obtain energy by depleting the body’s nutritional reserve or even consuming their own skeletal muscle in the form of vigorous glycolysis. As the energy consumption of tumor patients increases significantly, while the disease itself and the adverse effects of various treatments lead to low appetite and digestive ability of patients, reducing the intake and absorption of nutrients, so many tumor patients are in different degrees of malnutrition, which, if not corrected, will reduce the effectiveness of tumor treatment, amplify the toxic side effects of chemotherapy and radiotherapy, reduce the quality of life and shorten the survival time. Adequate dietary intake will not make tumors grow faster, but it should be emphasized that tumor patients should not blindly take “big supplements”, as excessive food intake will increase the metabolic burden of patients, and the resulting overweight and obesity will be detrimental to tumor prevention and treatment. In a word: for tumor patients with good nutritional status, there is no need to deliberately increase nutrition. It is unfortunate to suffer from tumor, and scientific and correct medical information is especially important for patients. If you think it is difficult to distinguish the authenticity of various eye-catching miracle treatment stickers, you may leave it to professionals to identify them.