In our impression, vitamin C is something that is harmless to the body. It is an essential nutrient for our body. The lack of vitamin C will cause sepsis, and in severe cases, it can lead to death.

Because vitamin C has antioxidant properties, publicity says that supplementing vitamin C can whiten and make the skin better; it is also antioxidant and anti-aging; vitamin C also has synthetic antibodies. It has the function of enhancing immunity, so eating a little more every day can prevent colds. It seems to be particularly powerful. Is this really the case?

There is indeed research from Harvard University that shows that supplementing 200 mg of vitamin C every day can reduce the risk of colds by half. But this only applies to people who perform a lot of exercise in harsh environments, which can easily consume a lot of physical energy quickly and lead to vitamin C deficiency, such as marathon runners, ski enthusiasts and other people.

To put it simply, for people who are prone to vitamin deficiency, leading to reduced immunity, vitamin C supplementation can indeed improve immunity to a certain extent, thereby helping to prevent common colds, but for general health For the crowd, it may not be useful, and it may also cause some harm.

I believe everyone still remembers the news that a girl died after eating lemons and crabs. The pentavalent arsenic in crabs combines with vitamin C to form a poison commonly known as "arsenic."

But in fact, the real cause of the girl's death was not just eating lemons. The vitamin C content in lemons was far from the lethal amount of arsenic, and the large amount of vitamin C tablets the girl usually took for whitening was the reason. The culprit.

In addition, excessive intake of vitamin C may also induce other adverse consequences. For example, folic acid deficiency causes an increase in the risk of cardiovascular and cerebrovascular diseases, megaloblastic anemia, Alzheimer's disease and other diseases, gastrointestinal discomfort, nausea, vomiting, abdominal pain, diarrhea, hyperacidity, gastric reflux and other gastrointestinal discomforts. symptom.

In addition, the metabolic end products of vitamin C include oxalic acid. Taking large amounts of vitamin C for a long time can lead to an increase in oxalic acid and may also form urinary system stones.

In short, although vitamin C is an indispensable nutrient, it also has a maximum tolerated dose. The recommended daily intake of vitamin C for adults is only 100 mg. Eating one kiwi fruit is almost enough. Long-term use of vitamin C preparations is required.

If you take vitamin C in large doses for a long time, your body’s response to vitamin C will become slower and slower. You may achieve the effects of whitening and increasing resistance at first, but these effects will become more and more severe. Weak, you need to eat more and more vitamin C to maintain it. Once you stop taking the drug suddenly, it will also cause a withdrawal reaction, with symptoms of scurvy such as gum bleeding and gastrointestinal discomfort.