Joke Collection Website - Talk about mood - One gram of cooked tea contains 500 million molds. Drinking Pu 'er is equal to drinking dirty water? Is Pu 'er tea really out of the list?

One gram of cooked tea contains 500 million molds. Drinking Pu 'er is equal to drinking dirty water? Is Pu 'er tea really out of the list?

Scientific wormhole

China is the birthplace of tea, and tea culture has a long history. Every household will prepare tea, whether it is for drinking or entertaining guests, it will come in handy. There is also a lot of tea on the wine table. Some people are not good at drinking and will "replace wine with tea" to show respect.

Drinking tea has the effects of refreshing the brain, relieving depression and protecting health. Pu 'er tea is one of the most famous teas in China and also one of the most distinctive teas. However, with food safety being paid more and more attention today, some rumors about Pu 'er tea are rampant.

"One gram of cooked tea has five hundred million molds. Do you still drink? " "Drinking Pu 'er is equal to drinking dirty water and causing cancer! "Rumors like this have worried people. They dare not drink their favorite tea.

So, is Pu 'er tea really "bacteria exceeding the standard" as rumored? It has become a part of ordinary people's life. Can I still drink? Then let's talk about it.

China Tea Classic divides tea into six varieties, namely: green tea, black tea, oolong tea, white tea, yellow tea and black tea. The famous Biluochun belongs to green tea, Tieguanyin belongs to oolong tea, Junshan Yinzhen belongs to yellow tea ... Pu 'er tea belongs to black tea.

Pu 'er tea is produced in Pu 'er and Xishuangbanna in Yunnan. Yunnan big-leaf tea tree is made by fermentation process, which is divided into raw tea (raw tea) and cooked tea (cooked tea).

Shengpu soup is elegant in color, or yellow-green, with rich tea flavor; Cooked soup is red, bright and mellow. Whether eaten raw or cooked, the longer the storage time, the more mellow the fragrance.

The production process of raw tea and cooked tea is also different. The two kinds of raw materials are fresh leaves of Yunnan big-leaf tea tree, which are made into Yunnan big-leaf sun-dried tea after deactivation, rolling and drying.

After the sun-dried green tea is made, it will continue to enter the processing flow to make raw tea and cooked tea. The difference between the two is that raw tea is obtained by re-grading, steaming, shaping and subsequent Chen Fang.

However, when the sun-dried green tea is boiled, it must be sprinkled, piled, dried and finally steamed to form loose tea.

In the production of rice, there is a particularly important process, that is, artificial composting and fermentation. This process requires the participation of many strains, including Aspergillus Niger, Rhizopus, penicillin, yeast, bacteria and so on.

It sounds like this. Is the cooked pu so dirty that even the brewed tea is hard to swallow?

In fact, don't worry, not all strains are terrible, and even some strains can be used by people. For example, the strains in the production of Pu 'er tea are harmless to human body.

Moreover, it is precisely because of these microorganisms that Pu 'er cooked tea can appear before our eyes.

Let's take Aspergillus Niger as an example, which is one of the important fermentation strains and the key factor of pile fermentation of Pu 'er tea. At a suitable temperature, it can secrete amylase, gluconic acid and other substances.

With the help of Aspergillus Niger, pectin and polysaccharide in Pu 'er tea will be decomposed, resulting in the effect of reducing blood fat and sugar. Moreover, in the process of fermentation, the reproduction of yeast and mold can also inhibit the reproduction of harmful bacteria.

Let's talk about the principle of heap fermentation. Its principle lies in three functions, namely, microbial function, enzyme function and damp-heat function.

Under these effects, a series of reactions will take place in the substances in tea, making Pu 'er cooked tea become familiar to people. For example, if the color of sun-baked green tea is changed to red, the taste will change from strong to mellow, and the aroma will also change.

Moreover, the difference between cooked tea and other teas mainly lies in the participation of microorganisms. Therefore, microorganisms are indispensable for making rice.

Is drinking Pu 'er tea anti-cancer or carcinogenic? Fang said that Pu 'er tea can't guarantee hygiene in production and storage, and cited several survey data to show that Pu 'er tea is easily contaminated by aflatoxin.

On the other hand, aflatoxin is a very deadly carcinogen. So, does Pu 'er tea really cause cancer? The answer is no.

In his article, Fang listed the relevant investigations of detecting aflatoxin, but in fact, the sample he listed was wet stored tea.

Wet Tibetan tea refers to tea stored in high temperature and high humidity environment. This kind of tea has a disadvantage that it is more likely to produce mycotoxins.

So this is not a problem of Pu 'er tea, but a problem of storage mode. So, is Pu 'er tea on the market safe? In this regard, a number of related tests have given the answer.

For example, the Institute of Microbiology of Yunnan University and other institutions jointly detect Pu 'er tea in the market. The results showed that aflatoxin was not detected in raw tea, cooked tea and polluted Pu 'er tea during storage.

In 2008, Shenzhen Institute of Metrology and Quality Inspection undertook the scientific and technological project of the General Administration of Quality Supervision, Inspection and Quarantine "Study on Detection Methods of Mycotoxin in Food and Raw Materials", and conducted a thorough investigation on tea. As a result, mycotoxin was not detected, and naturally there was no aflatoxin.

To sum up, there are strains in Pu 'er tea, but these strains are harmless and very important for the production of cooked tea. Pu 'er tea produced normally has no mycotoxin and will not cause cancer.

Although Pu 'er tea will not cause cancer, it should be carefully eaten and preserved in order to drink with confidence and fragrance.

Before making tea, Pu 'er tea needs to be washed with boiling water, raw tea 1 time, and cooked tea twice, each time for no more than 3 minutes.

Pu 'er tea is more fragrant as it ages, but it also has the best drinking period. If the tea leaves have peculiar smell (such as musty smell), or the brewed tea soup is turbid and unpleasant, it is bad and not suitable for drinking.

Drinking overnight tea will not cause cancer, but it is not recommended to drink overnight tea because nutrients are lost and microbial content is increased, which may deteriorate.

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