At the moment of the COVID-19 pandemic, the Internet is filled with news related to how and what materials can prevent and cure COVID-19, which makes it difficult for people to distinguish the true from the false for a while, and the tea, which is called the "panacea", is also hard to escape.

It is reported that Yunnan Agricultural University discovered for the first time that Green Tea Extract EGCG can strongly bind to the COVID-19 S protein and blocks its binding to the ACE2 receptor, which has the potential to prevent and treat COVID-19 infections.

For this reason, Wang Xuanjun, director of the Key Laboratory of Pu'er Tea Science of the Ministry of Education of Yunnan Agricultural University, said: Blocking experiments have found that EGCG, a catechin monomer component in tea polyphenols, can effectively block the binding of S protein to the receptor ACE2. , Almost 6 EGCG can reach the ability of 1 human receptor to bind to the virus S protein. But at the same time, he also claimed: To be precise, the tea you usually drink will not be directly effective in preventing or treating COVID-19 infections. First, a certain dose is required, and second, proper use is required. Therefore, prevention or treatment cannot be based on the concentration and method of drinking tea. If the concentration of active ingredients is increased with tea extract, the purpose of prevention or treatment may be achieved. . Therefore, although in vitro experiments have shown that EGCG can block the combination of viruses and human cells, it cannot be expected that drinking tea alone can prevent new coronary pneumonia. All in all, we cannot use tea as a "protective shield" against viruses. Scientists tell us the efficacy of various substances in preventing epidemics. We must also objectively understand what scientists say, and don't make false guesses.

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