Eat more alkaline food can reduce the chance of cancer, pregnant women wear protective clothing can effectively prevent computer radiation, eat fruit before meals for better nutrient absorption, eat more enzymes can detoxify …… For a period of time, WeChat circle of friends in a variety of “rich” scientific and technological content The “advice” is getting more and more, making it difficult for people to distinguish the truth from the falsehood, and do not know what to do. These seemingly well-intentioned, head “advice” whether there is no scientific basis? And what is the truth? Technology Vision Edition from today launched “these WeChat ‘advice’ reliable?” A series of reports, selected from some of the widely circulated scientific and technological rumors in the WeChat circle of friends, authoritative experts to solve your doubts, clear the source and reveal the truth. Is the problem of human acidity and alkalinity reliable? WeChat “advice”: Some research shows that cancer cells do not easily survive in alkaline environment, so cancer will not be generated in people with alkaline constitution; on the contrary, people with acidic constitution have a higher chance of developing malignant tumors. Therefore, people with acidic body should eat more alkaline food (such as green leafy vegetables and fruits) in their daily life to change their body constitution so as to reduce the chance of developing cancer. Response: There is no distinction between acidic and alkaline body. Artificially interfering with the acidity and alkalinity of body fluids may bring side effects. Yang Yangui: This viewpoint does not make sense from the biological point of view. There should be no difference between acidity and alkalinity in the human body. There are many kinds of fluids in the human body: intracellular fluid, extracellular fluid (blood plasma, tissue fluid and lymphatic fluid), as well as the secretion of various digestive fluids, excretion of sweat, urine and so on. Each of these fluids has its own pH, which cannot be measured by pH value. The pH is the value of the index of hydrogen ion concentration in a solution, generally between 0 and 14. When the pH value is 7, the solution is neutral; less than 7, it is acidic, the smaller the value, the stronger the acidity; greater than 7, it is alkaline, the larger the value, the stronger the alkalinity. In the normal physiological state of the human body, the pH value of blood is precisely maintained between 7.35-7.45, which is weakly alkaline. In addition, the pH of pancreatic fluid is as high as 8.8, which is strongly alkaline. And there are several parts of the body that must be on the acid side to be considered healthy. For example, the pH of the stomach is between 1.5 and 2; the pH of healthy skin should be about 5.5, which is weakly acidic, so that it can protect the skin from breeding bacteria easily. In other words, human body fluids have their own acidity and alkalinity, and cannot be divided into acidic and alkaline body in general. Artificial interference with body fluid acidity and alkalinity may bring unexpected side effects. Mi Shuangli: It is true that cancer cells cannot survive in an overly alkaline environment, but it is also true that they cannot survive in an acidic environment. By the same token, other normal cells in the body also grow better in the proper acidic and alkaline environment of their respective tissues and organs. Besides, the so-called acidic and alkaline food should be called acidic food and alkaline food, which is only a kind of acid-base determination of food by chemists and does not play a substantial role in changing the acidity and alkalinity of human body. On the contrary, the growth of tumor may cause the microenvironment around the solid tumor to become acidic. Some scientific studies have found that the pH of the microenvironment around solid tumors is indeed lower than that of normal tissues and organs. This is because tumor cells grow faster than normal cells, and the supply of blood vessels, oxygen and nutrients in tumor tissues often cannot keep up with the rapid expansion of tumor cells, so more acidic metabolites such as lactic acid are generated, making the pH of tissue fluid around tumor tissues lower. However, the pH inside the tumor cells is the same as that of normal cells. It is worth emphasizing that the effect of solid tumors on the pH of body fluids is limited to the microenvironment around the tumor tissues, and there is no scientific evidence that solid tumors cause the body fluids of the whole body to become acidic. Should radiotherapy be done or not? WeChat “advises”: After cancer surgery and radiotherapy, while a large number of cancer cells are killed, normal cells will also be killed, which will completely destroy the immune system of human, but will accelerate the deterioration of the disease and accelerate death, which is far less effective than conservative treatment. Response: More and more cases have proved the therapeutic effect of chemoradiotherapy drugs on cancer. The future development of precision medicine will make radiotherapy less and less side effects. Yingli Sun: Overall, more and more cases have proven the therapeutic effect of chemoradiotherapy drugs on cancer. For example, because of the anti-cancer drug cisplatin and other drugs, the testicular cancer cure rate has increased from less than 70% in the 1970s to 96% today. Of course, there are some cancer patients who die faster because of the side effects of radiotherapy and chemotherapy, which are caused by several factors. First, radiotherapy does have many imperfections. For example, due to the lack of targeting and the lack of precise identification, it kills a large number of cancer cells while also killing many non-cancer cells, and some patients will have a strong chemotherapy response as a result. Second, inappropriate medical strategies can also magnify the side effects of radiotherapy. The treatment effect of radiotherapy has a lot to do with the level of the treating doctor, and the amount of drugs used is very critical. In regular large hospitals, there is usually a team of professional physicians to conduct a comprehensive assessment of the cancer patient’s body before doing radiotherapy, and then determine the treatment plan. However, sometimes the medical team is limited by various conditions and fails to make timely adjustments during the treatment process, and as a result, the patient ends up dying from the failure of organs such as the heart or other complications instead of dying from cancer. Mi Shuangli: Currently, precision medicine, also called personalized medicine, is particularly promoted in the field of cancer research and treatment. It is a designated medical model, based on individual genomic information, combined with proteomic, metabolomic and other relevant internal environmental information, to design the best treatment plan tailored to the patient, with a view to maximizing treatment effects and minimizing side effects.