Even the American Medical Association and the American Health Foundation have proven to oppose his arguments, claiming that his research is inaccurate, and that existing research has shown that those who take 2,000 milligrams of vitamin C a day have the same chance of catching a cold as those who take a placebo every day. But even so, there are still countless voices shouting that vitamin C can prevent and treat colds, which is a typical case of science losing to superstition. ”

Liu Liping sighed: "This person is really weird, and the poison is far-reaching, if you didn't say it, I wouldn't know that this thing is useless for colds." Is it that eating fruit or something doesn't work?"

Xu Yi nodded: "It's useless, but the fruit has a high content of simple sugars and is easy to absorb, and it is rich in dietary fiber, and it can also supplement vitamins, which can be regarded as enhancing human nutrition, and it is not without effect on people who are deficient in corresponding substances, but this food is food, don't think it can cure diseases." Even if you don't have a cold, you should eat some fruits in moderation if you can. ”

"That's how vitamin C anti-tumor comes from?"

"Yes, after this argument was rejected, he still refused to admit his mistake, and even claimed that taking vitamin C, vitamin E and selenium in large doses can prevent and treat a human disease, and even have miraculous effects on tumors and AIDS, which had just landed in the United States at that time!"

The fat man couldn't help but have a black line in his head, and said: "Isn't this similar to Zhang Wuben's selling mung beans, white radish, and long eggplant?"

Xu Yi said with a smile: "Yes, the most ironic thing is that Linus Pauling's wife died of stomach cancer. And he himself died of prostate cancer, and the almighty vitamin did not make him immortal. There was a pause. Xu Yi continued: "I even suspect that they are probably the result of taking an overdose of Dimension E-guide. Because there are studies that prove that excessive consumption of vitamins. It is likely to lead to various risks. In particular, long-term use of vitamin E in large quantities is more likely to lead to heart disease and prostate cancer, or the Nobel laureate is also self-inflicted. ”

"Vitamin C has been proven to help with collagen synthesis in the body, so that's why vitamin C is added to many cosmetics. You know that in addition to vascular smooth muscle, the main thing left in the intima of blood vessels is collagen. Studies have proved that people who take a large amount of vitamin C for a long time will thicken the intima in the neck arteries twice as fast as those who do not take it, and if smokers take vitamin C, the intima in the blood vessels will thicken five times faster than that of ordinary people! One of the most direct indicators for diagnosing arteriosclerosis is the thickness of the intima of blood vessels. It is foreseeable that long-term high-dose use of vitamin C is likely to be one of the risk factors for arteriosclerosis. ”

"Even if you don't think about this, you have to consider the impact of metabolites. Didn't we say that sucrose is an influencing factor for kidney stones, and the metabolite of vitamin C is also oxalic acid, which undoubtedly also increases the risk of kidney stones. ”

"Then it's useless to eat vitamin C for a cold?"

"Of course it doesn't work, even cold medicine can't cure a cold. In fact, this is true whether it is Western medicine containing pseudoephedrine hydrochloride and other things, or traditional Chinese medicine containing Yinqiao and Banlan root. ”

Liu Liping listened. I couldn't help but cry out: "Ah, isn't there no cure for that cold, is it wrong that everything I teach in my book?"

"It's not that there is no cure, these medicines are not really useless, and they can more or less relieve the symptoms of colds. These drugs are mainly used to calm asthma. It mainly dissolves phlegm, and even has a certain antibacterial effect, but the pathogenic mechanism of viruses is completely different from that of bacteria. Therefore, these medicines definitely do not have the effect of clearing the virus, just like the use of antibiotics for colds is often over-medicated. Unless you have a cold because of a decrease in respiratory resistance. Antibiotics are only necessary when there is a concurrent infection. If there is no infection, it is useless. ”

"Only drugs such as amantadine and Tamiflu that are really effective against cold viruses can have a real therapeutic effect on colds. But unfortunately, these things also have strong side effects on the human body, you can see antiviral drugs, and even some antiviral drugs have most of the instructions on the words forbidden for pregnant women, this is because many drugs are teratogenic, even if pregnant women take a large number of antiviral drugs for a long time, the incidence of tumors will be greatly increased. ”

"The reason why cold medicine is over-the-counter is precisely because it is not used to treat diseases, most of them are only for the purpose of relieving symptoms, and there are not too many toxic side effects, so they are not used as prescription drugs. As a self-limiting disease, generally speaking, if you don't take cold medicine for fifteen days, you can take cold medicine for half a month, there is no difference at all, in fact, even SARS and avian flu are the same, this is mainly based on supportive therapy, and you have to rely on it to heal on its own. ”

Hu Yifei remembered what happened before and asked Xu Yi: "Third child, why does SARS still purchase from abroad, isn't this thing useless?"

"Banlan root and strength were used a lot during the SARS epidemic, and they were advertised as useful, but in fact, it was more to avoid the panic caused by the heavy epidemic to the people. What would be the consequences of saying that there is no cure for these diseases? Xu Yi sighed and said: "Stabilizing the social state of dìng, which was far more important than treating diseases at that time, it can be said that these things have their political needs, which are far more important than medical needs." Something like this plausible is actually not uncommon in clinical practice, and as for the real effect, you have to learn to judge for yourself. The real treatment for SARS and avian flu can only be Tamiflu, these antiviral drugs, and there is no scientific basis to prove that the root of Banlan has any preventive or therapeutic effect on cold viruses, even if you soak in it, you will not be infected. ”

Liu Liping asked curiously: "What is the effect of drinking more water when you have a cold?"

Xu Yi smiled and said: "Many people think that drinking water dilutes the body fluids to excrete the virus, but in fact, it is also a misunderstanding. The dynamic balance of water in the body, drinking water does not dilute body fluids at all. What's more, the water enters the digestive tract, but the infection site is the respiratory tract, and it is absolutely impossible for this water to wash away the virus, even if the water enters the respiratory tract, it is useless, so even if it chokes people to death, it is impossible to wash the virus away. ”

"Even if you have a cold and drink water, you will also have a cold, the body will also reactive warming, this loss of water will increase, and it will naturally be replenished, drinking water is better than hanging salt water, and hydration is also the only use of drinking water. However, if some people's body temperature does not rise significantly, there is no need to drink more water, especially those patients with abnormal kidney function, drinking it is useless, and it also increases the burden on the kidneys. ”

Xu Yi handed the bottle to Liu Liping and asked, "The same intriguing thing is the tocopherol in it, do you know what this thing is?"

Liu Liping looked at it, of course she knew a few words, but when combined, she really didn't know what this thing was, so she shook her head at Xu Yi.

Xu Yi said: "Saying this name, this is naturally to keep it mysterious and appear high-end and high-end." In fact, I said that you must know the other name of this thing, and you are familiar with it, in fact, tocopherol is vitamin E. ”

"Ah, it's vitamin E!"

Xu Yi nodded and said: "Vitamin E can be absorbed through the skin logically, and I think you should be clear about its effect, this can fight against oxygen free radicals, and even theoretically has a better effect than superoxide dismutase." ”

"That means it's absorbed through the skin, which must be beneficial?"

Xu Yi shook his head and said: "Don't be too happy, as a phenolic substance, vitamin E can be slowly oxidized in the air, after all, hydroxide is also a strong free radical, and it is also weakly acidic, and sodium hydroxide can also generate phenol salts to lose their own activity, so how much vitamin E you add here, how much can be left is already a difficult thing to judge." ”

"As a fat-soluble vitamin, it can naturally penetrate into the phospholipids of the cell membrane and penetrate into the cell, but it takes a long time to reach the underlying tissues, and you can imagine how long it takes for this thing to enter the body with reference to pesticide poisoning. ”

"Isn't pesticide poisoning coming on very quickly?"

Yan Peimin shook his head and said: "If it is not taken through the digestive tract or inhaled by the respiratory tract, most of the symptoms will not appear until a few hours or even more than ten hours after the exposure, is this the case for the third child?"

Xu Yi nodded: "That's the case, you can imagine that it takes so long, and because they disperse to the body surface and contact with oxygen, coupled with the influence of human body activity, body temperature and ultraviolet rays, how much of this thing is oxidized, and how much can be left is difficult to say, and even there will be no remaining vitamin E at all." ”

"Of course, I'm theoretically analyzing, in fact, there may be some vitamin E under the skin to a greater or lesser extent, but you still don't rush to be happy. Glancing at Liu Liping, Xu Yi said with a smile: "For vitamins, the human body does not need much, and as for fat-soluble vitamins, the human body needs less. For example, vitamin D, in fact, even if you are elderly, there is no need to supplement, as long as you can ensure that you are exposed to the sun for ten minutes a day, the vitamin D produced by the skin is enough for the human body. ”

"The human body does not need much vitamin E, and even the domestic nutrition guidelines do not put it alone, and even the nutrition guidelines in the United States only recommend that the daily intake is about 10 mg. It can be said that the vitamin E on the market is often tens or hundreds of milligrams, and I dare not guarantee that long-term consumption of this thing will not cause the remaining vitamin E to be distributed and accumulated in the body fat, which will eventually lead to adverse consequences. Moreover, vitamin E is still a lot in our food, and there is no need to take it orally, which I think is why the domestic nutrition guidelines do not list it separately. In this way, it is also distributed to all parts of the body by blood circulation, not to the skin alone, if that is the case, I am afraid that it will really cause the skin to accumulate too much vitamin E, resulting in the consequences of poisoning. (To be continued......)