Tea can be brewed up to a few times, and tea leaves can be brewed up to a few times

1. The first soup of tea (the first tea soup "water") cannot be poured, because the soluble organic components in the tea are about 80% of the tea brewed for the first time, about 10% of the second soup, and 5% of the third soup. So what do you do with tea after the first soup is poured? It's worthless to soak it naturally three times.

2. The more tender the tea is relatively good (except for oolong), and the good tea generally has only one or two soups.

3. After the tea is soaked for a long time, the heavy metals and other toxic substances in it will come out.

It is best not to brew loose tea more than three times.

Some people in life like to brew tea repeatedly until they can't taste good; Others brew once or twice.

Hurry up and change the tea. Which of these two methods is correct, and how many times is it better to brew a cup of tea? The reporter interviewed the medium.

Yin Junfeng, associate researcher of the Tea Research Institute of the National Academy of Agricultural Sciences.

Yin Junfeng told reporters that some people like to drink weak tea, and some people like to drink strong tea, although the tea brewing time.

The number has a lot to do with the taste of different people, but in terms of nutrient absorption, it is best to brew the tea bag only once, in bulk.

Don't make more than 3 teas.

He explained that tea contains tea polyphenols that have a cancer-suppressing effect, tea polysaccharides that can lower blood sugar, and make the central spirit.

Excitable caffeine, as well as a variety of amino acids, vitamins and other nutrients. How much of these nutrients can be precipitated.

It has a lot to do with the number of brews. Generally speaking, the larger the shape of the particles, the nutrients precipitate.

the slower; The smaller the particles, the faster they will be precipitated.

Compared with bulk tea, the tea leaves of bagged tea are fully destroyed by cutting and kneading during processing, and the particle shape is relatively small, and the nutrients in the tea will be 80%-90% after the first soaking of 3-5 minutes

After the second brewing, the remaining 10% or so of the nutrients are almost all precipitated. Therefore, Yin Jun.

Feng suggested that it is best to brew bagged tea once, not only does it not lose much in the absorption of nutrients, but it will not affect the taste.

and taste. Due to the relatively large particles of bulk tea, the first brewing time should be longer, which should be about 5 minutes, and 60%-80% of the nutrients will be precipitated; After the second brewing, there will be 80%-90% nutrient analysis.

Go out; After the third brewing, the leaching rate of nutrients will exceed 95%, and if you brew again, there will be no nutrients.

I used it. As for some experts, after brewing many times, tea will leach out harmful substances such as pesticides and heavy metals.

Yin Junfeng pointed out that although there is some truth in this statement, there is no need to worry too much. At present, tea production in China.

Most of the pesticides used have very low water solubility, calculated based on 10 grams of tea per person per day, even if 1 mg is brewed kilogram residue.

The remaining tea leaves, the intake of pesticides is only milligrams, which is the daily allowable intake stipulated by the World Health Organization.

Thousandth. The leaching rate of heavy metal lead in tea is also relatively low, as long as you buy tea from regular manufacturers, it contains.

The amount will not exceed the national standard.

To put it simply, brewing multiple times is not harmful, but it will be tasteless.

The specific number of brews has a lot to do with the way the tea is processed.

Generally speaking, only for loose tea, use the usual suitable brewing method (tea volume, water temperature, steeping time):

Non-fermented tea, green tea, about 3 brews.

Fully fermented tea, black tea, black tea, about 10 brews.

In the case of broken tea and final tea, the number of brewing times will be reduced accordingly, because the inclusions of this form of tea will leach faster.

Of course, the number of brews is also related to the quality of the tea, generally speaking, the better the quality, the more times it can be brewed.

Different teas have different foaming resistance.

The varieties of green tea, white tea, and yellow tea are all 3 times.

Black tea 3 5 times

Oolong tea (Tieguanyin, Dahongpao and the like belong to oolong tea) can be brewed about 7 times of black tea, Pu'er tea can be brewed twice, people drink bags of black tea, green tea and flower tea, generally brewed 1 time after the tea residue is discarded. Because this kind of tea is processed and manufactured, the leaf cells are fully destroyed by cutting and kneading, forming granular or fine-shaped flakes, and the effective contents of the tea are easily leached out when brewing. After 3 minutes of brewing flower tea, black tea and green tea with boiling water, about 55% of the total amount of soluble matter can be dissolved for the first time; The second brew is about 30%; The third brew is about 10%; The fourth brew is only 1%-3%.

Judging from the fact that the vitamins and amino acids contained in the tea are dissolved, 80% are leached out during the first brewing; The leaching rate reached more than 95% at the second brew; The same is true of other active ingredients contained in tea, such as tea polyphenols and caffeine. From the actual situation of the aroma and taste of tea brewing, 1. The aroma of tea is rich and the taste is fresh; 2. Although the tea is thick and astringent, the taste is not as fresh as before; 3. The aroma and taste of brewed tea have faded; If it is brewed again, it has no taste, and it seems to drink boiled water. Some scholars pointed out that after many brewing of tea, some insoluble harmful substances, such as some very small amounts of residual pesticides, will be gradually leached.

Therefore, 3 grams of flower tea or black tea or green tea should be brewed 2-3 times per cup of tea, and it is not advisable to brew it many times.

Three times. Tea has a common feature that no matter what kind of tea, its first brewing and leaching amount can account for more than 50% of the total amount of solubles, and the second brewing of ordinary tea is generally about 30%, the third time is about 10%, and the fourth time is only 1-3%. Therefore, although the number of good tea brewing is small, it is mainly because the tea leaves are tender, so they are fresh and taste good!

In addition, from a nutritional point of view, 80% of the vitamin C and amino acids in tea are leached after the first brew, and more than 95% are leached after the second brew. Other active ingredients such as tea polyphenols and caffeine are also the largest in the first extraction, and after three brewings, the full amount is basically leached.

In addition to the tenderness, the brewing resistance of tea is mainly determined by the method of tea processing. In the initial process, the tea leaves are chopped, and the tea leaves are easy to brew, and the coarse, old, and complete tea leaves are brewed slowly.

No matter what kind of tea, the first brew, the amount of leaching accounts for 50% of the total soluble matter; The second brew generally accounts for about 30%; about 10% for the third time; The fourth time it's only 1% or 3%. From the perspective of its nutrients (vitamins and amino acids in tea), 80% of the amount is leached in the first brew, about 15% in the second brew, and basically all leached after the third brew. Tea aroma and taste, a brew of tea has a strong aroma and a fresh taste; Although the second brew tea is strong, the taste is not as fresh as before; The aroma and taste of the three bubbles of tea have faded; If it is brewed again, it will have no taste.

For general black tea, green tea and flower tea, it is advisable to brew 3 times. Oolong tea has a large amount of leaves when brewing, and the tea leaves are coarse and old, so it can be brewed several times. Tea bags made from black crushed tea are usually suitable for one-time brewing.

The practice of brewing a cup of tea from morning to night is not advisable. After many brews, tea can make some insoluble harmful substances (such as some very trace amounts of residual pesticides) gradually leached, which is harmful to the human body. The ideal way to brew is a cup of tea in the morning and a cup of tea in the afternoon every day, which has both freshness and tea aroma.

Is that okay?

Tea is generally brewed 3-5 times, there is no clear regulation, it can be determined by personal taste and type of tea.

There are many types of tea, generally chrysanthemum tea and jasmine tea and honeysuckle tea, and also include Emei tea, Lu Zhihuai and oolong tea and black tea, etc., drink some tea appropriately, can play a role in awakening, and if the personal taste is heavier, the general tea brew about 30 times, but if the personal taste is relatively light, you can brew about 5 times. And the more times the tea is brewed, the taste will be lighter, so the taste will also deteriorate, so it depends on the individual's taste.

It is not recommended to drink tea water at night, because drinking too much tea may cause insomnia or affect sleep quality.

The effect of tea is early friends

For example, tea contains amino acids and proteins and plant alkaloids and also contains tea polyphenols, containing a variety of trace elements, such as calcium, magnesium and cobalt, and the taste of tea is related to the tea set and water temperature and preparation method, so you can properly learn some procedures and processes for making tea, and also choose the way to make tea according to personal preferences and regional customs, so as to increase the taste of tea.

Tea contains a large amount of caffeine, which has the effect of refreshing and refreshing the brain, can excite the dog's nerves, relieve fatigue, and can effectively improve work efficiency. Tea is rich in tea polyphenols, which can play an antioxidant role, reduce the damage of ultraviolet radiation, and speed up skin metabolism. Drinking tea regularly can predict and prevent colds, improve human immunity, and ensure adequate sleep at ordinary times, so you can participate in outdoor sports appropriately.