Coke-this sweet, sparkling "soft drink" is the favorite daily drink of many people. But for some time, there have been more and more negative reports about coke. Many cola fans are "intimidated" by the statement that Gaman dostum may kill them, that cola may harm their teeth and that cola may lead to osteoporosis. So, how true and false are these statements? Statement 1: Coke and Mantos will kill you. Recently, a post entitled "Mantos Sugar and Coca-Cola will be fatal when eaten together" has been widely circulated on major websites. In addition to the text narration, there is also a video of "Coke Fountain" demonstrated by netizens. In these videos, more than a dozen mantos are put into newly opened coke bottles, and a coke "fountain" as high as half a meter will be ejected within a few seconds; The experiment with Wangzai steamed bread has the same effect. At the same time, the rumor of "two deaths in Brazil" is even more worrying. Regarding this question, Fan Zhihong, an associate professor in the College of Food Science of China Agricultural University, said that he had heard of it. However, she said that it is nothing new for coke to form a fountain, because the carbon dioxide in coke is added under high pressure. If you shake or heat the bottle before opening it, it is entirely possible to spray a lot of liquid. Champagne, beer and the like also contain a lot of bubbles, which may have the same effect, but people will not feel different after drinking it. The harm of Coca-Cola to people is a bit sensational. Yu Kang, deputy director of the Nutrition Department of Peking Union Medical College Hospital, also said that the internal environment of the human body is different from the experimental environment and cannot be generalized. In this regard, Chloe Wang, manager of Coca-Cola Public Affairs and Communication Department of Coca-Cola Company, said that because Mentos mints are loose in appearance and easy to absorb water, when they encounter carbon dioxide in carbonated drinks such as Coca-Cola, they will soak and produce a lot of bubbles. "But when eating sugar, the surface of the sugar will be immediately destroyed by chewing and saliva, so there will be no large amount of foam when encountering carbon dioxide." Statement 2: Coke can cause osteoporosis. Experts believe that this statement is correct. In the past, it was generally believed that osteoporosis was a disease of the elderly, especially a common disease of postmenopausal women. However, a recent study by Harvard University's Institute of Public Health shows that girls who love cola are five times more likely to have fractures than girls who don't drink soft drinks. Fan Zhihong said that phosphoric acid in cola may be the reason for the increase of fracture rate, because a large amount of phosphorus will affect the body's absorption of calcium. Yu Kang said that the caffeine contained in cola also has decalcification effect, but the content is small, so it is not a big problem to drink a small amount. Statement 3: Coke can dissolve nails. Some people have done experiments, put nails in coke, and nails will gradually dissolve! So many people think that coke that can "swallow" nails must be harmful to the stomach! Fan Zhihong explained that phosphoric acid in cola is a strong acid, and it still has certain acidity even after dilution. Moreover, phosphoric acid is very corrosive to iron. As long as there is enough coke and enough time, it is possible to make nails "disappear". However, there are many more "powerful" gastric acids in people's stomachs. In contrast, the phosphoric acid in cola is "dwarfed". So coke won't dissolve our stomach, but it will still bring a certain burden to the stomach. Patients with gastric ulcer had better drink less. Statement 4: Drinking too much cola is easy to get esophageal cancer. Indian medical scientists have found that people who drink a lot of carbonated drinks such as cola have a relatively high incidence of esophageal cancer. Researchers speculate that the pressure of carbon dioxide may cause gastric acid to reflux into the esophagus, thus stimulating the esophagus and inducing esophageal cancer, but there is not enough research evidence for this explanation. But what is certain is that people with digestive tract diseases and people with gastrointestinal dysfunction should strictly control aerated drinks. However, Yu Kang has different views on this. "Clinically, there are also gastrointestinal patients who drink cola. It won't do any harm to drink a little occasionally. " Statement 5: Too much coke hurts your teeth. This is also recognized by experts. Because cola contains carbonic acid formed by dissolving phosphoric acid and carbon dioxide, it has a certain corrosive effect on enamel. Therefore, children and the elderly with "fragile" teeth should drink less cola or use straws to avoid direct contact between cola and teeth. In the interview, both experts said that it is ok to drink less coke every day, but drinking more is definitely bad for your health. Yu Kang said, "Coke contains a lot of sugar-these sugars are absorbed quickly and easily lead to excessive calorie intake. In addition, it is still unknown whether the additives contained in cola have an impact on health. For those who are used to drinking cola for a long time, drinking more boiled water is still the correct way to' quit' coke addiction. " ■ It is difficult to confirm the spermicidal effect of cola at present. "The experimental results can't directly explain whether cola can kill sperm because it contains too many possibilities." Professor Xin Zhongcheng, deputy director of the andrology center of the First Hospital of Peking University, explained after understanding the experiment that spermatogenesis is controlled by various complex mechanisms, and spermatogonial stem cells gradually differentiate into sperm. Normal men can produce a lot of sperm every day, but usually only the best sperm are fertilized with eggs. The process of sperm differentiation and development is influenced by many factors, such as internal factors and external factors. Studies have shown that various environmental pollutants can affect the differentiation and development of sperm and its fertilization function. Environmental pollutants, including estrogen drugs, pesticides, food additives, cosmetics, automobile exhaust and burning smoke, can damage sperm differentiation and development and sperm vitality through pre-testicular, testicular and post-testicular levels, leading to male reproductive dysfunction. Teenagers in the process of differentiation and development and couples who plan to have children in the near future should stay away from environmental pollutants, including all kinds of drinks. Some studies show that cola may have a negative effect on sperm. If we want to verify whether the ingredients in cola drinks will affect sperm, we need to design a reasonable research method according to the principles of evidence-based medicine to verify whether long-term oral drinking of cola and other drinks will have a negative impact on spermatogenesis and function, and at the same time, we should pay attention to the influence of other factors on spermatogenesis. However, this experiment uses a large number of samples, and then makes a comparative analysis. In the process of the experiment, it is necessary to strictly divide the two groups of people who drink cola and those who don't drink cola. After obtaining the experimental data, through sample sampling investigation, the experimental conclusion is finally drawn by the scientific method of mathematical statistics. ■ Pregnant women often drink cola, which will lead to fetal death. Besides men, coke has a great influence on pregnant women. Dr. Zhao Tianwei, a member of the technical expert group on maternal and child health care in Haidian District, Beijing, told us: "Caffeine in cola is a stimulant, and pregnant women will become nervous and hyperactive after drinking it. If you drink it for a long time, it will directly lead to an increase in the probability of ADHD in the born child, which will seriously lead to fetal death. In addition, caffeine in cola will indirectly enter the baby with the mother's milk, thus affecting the baby's health. In addition, if the child has not yet been born, caffeine can easily enter the fetus through the placenta, affecting the normal development of the fetal brain and lungs. Dr. Zhao Tianwei also said, "In addition to quitting smoking and drinking, couples who want children must drink less caffeinated drinks such as cola. During pregnancy, mothers should exercise less, eat more high-protein foods, and eat more high-calorie foods near labor to ensure that physical strength consumes supplementary energy. ■ Children should try to avoid drinking Coke regularly. Does cola affect the growth and development of adolescent boys? Xin Zhongcheng said: "The boy's nocturnal emission shows that he is sexually mature. Boys have sperm 3-4 years before nocturnal emission, but coke has little effect on sperm. Even so, food chemicals and environmental chemicals will still affect reproductive function and unborn babies. " Dr. Gao Huiying from China Nutrition Society said, "Coke is a carbonated beverage with high sugar and caffeine. Children who drink this drink for a long time will get fat, which will seriously affect their intellectual development.