Question 1: Can drinking tea cure a cold?

Tea was used as medicine at first, and then as a drink. As time goes by, people find that tea has more and more health care functions and pharmacological effects. Although from the medical principle of human body, tea has an auxiliary function.

Nowadays, although some components in tea, such as EGCG and theanine in tea polyphenols, can be extracted and developed into drugs for treating diseases, tea is not a medicine, not to mention a cold, and it cannot be called a "cure-all". So the best way to get sick is to see a doctor and take medicine.

Question 2: Can you lose weight by drinking tea?

It can be said that tea can lose weight, which is a proposition that all "fat" friends think can be established.

The doctoral thesis of Zhejiang University "Study on the Efficacy and Mechanism of Pu-erh Tea in Reducing Lipid and Weight" clearly states that Pu-erh tea has the function of preventing obesity, and Pu-erh tea has a significant lipid-lowering and weight-reducing effect on nutritional obesity, and its lipid-lowering effect is better than that of green tea and brick tea.

But this does not mean that tea can lose weight, but that tea can reduce fat. At the same time, many people will feel hungry after drinking tea, but they all ignore one thing-you will eat more when you are hungry! Therefore, there is a more reliable saying about losing weight: shut up and take your legs!

Question 3: Can all tea leaves cause insomnia?

Generally speaking, whether drinking tea can lead to insomnia depends on everyone's tolerance to caffeine contained in tea.

Old tea drinkers who drink tea for a long time can't sleep at night no matter how much tea they drink; Generally, tea drinkers try not to drink green tea, oolong tea, raw Pu 'er tea, yellow tea and white tea after 8 pm. However, black tea (excluding raw Pu 'er tea) has the deepest degree of fermentation, and its content changes according to a certain proportion, which will not have such a great impact on human sleep. For example, Liubao tea can be properly drunk even at night.

What is more special is black tea. On the surface, drinking black tea doesn't seem to cause insomnia, but in fact, due to fermentation, the composition changes in black tea will produce complex reactions, so people who drink black tea will not stay awake like drinking other teas, but will have delayed insomnia.

Question 4: Does only novice Xiaobai feel bitter about tea?

Compared with pleasing sweetness, bitterness has always been excluded and left out in the cold. In fact, compared with sweetness and salty taste, bitterness is caught in our mouth at the slowest speed, but it stays in our mouth for a longer time and has the strongest sensitivity to being caught. This is why many white people who just started drinking tea can't accept the bitter taste of tea.

In fact, not only Xiao Bai thinks that tea is bitter, but also old tea people will drink it. This is also because all tea is bitter. But when you know more, bitter taste can bring you more surprises than you think. It is generally believed that the bitterness of tea is caused by catechin polyphenols, and caffeine, theobromine and theophylline are the reasons that affect the bitterness of tea.

However, recent studies show that the bitterness of tea also comes from a few flavonoids, which have low content, low threshold and heavy bitterness, and have a strong influence on the sensory characteristics of tea, but the taste-presenting substances are complex.

From this point of view, all teas are bitter, but they are divided into normal bitter and abnormal bitter. Bitterness has dual effects on the taste and quality of tea soup. Generally, the bitter taste that can be quickly dissolved in tea soup can bring people a refreshing and pleasant taste, and it is also a good expression of taste. The bitter taste in the mouth for a long time will make people unhappy and affect the taste of tea soup.

For example, I often hear the pain of pulling my tongue, the pain that I can't swallow, and the pain that I don't want to drink another cup after drinking this cup. This kind of pain usually comes from a specific producing area, or more from technical problems. For junior tea lovers, a very simple way to distinguish one-if you drink bitter taste that makes you uncomfortable, then don't drink it!

Question 5: Can the first sip of tea wash away pesticide residues?

Dumping the first tea seems to have become a ritual and habit for China people to drink tea. Because they think that there are pesticide residues in tea, and the first tea soup will fully dissolve these pesticide residues, if dumped, most of the pesticide residues in tea can be removed.

In fact, most pesticide residues in tea are fat-soluble, not water-soluble, which means that these pesticide residues are generally only soluble in oil, but not in hot water.

What needs to be popularized again is that pesticide residues do not mean that pesticide residues exceed the standard. The state has strict dosage standards for pesticide residues in tea products. As long as it is within the standard, it is a relatively safe and hygienic product, so don't worry too much.

Of course, this is an inevitable fact in the process of food industrialization. Generally speaking, you can choose tea produced by regular big tea enterprises. If you are still not at ease, then choose the organic tea produced by these regular big tea enterprises. Moreover, the essence of a lot of tea is in the first bubble, and it is a great waste to pour out the first bubble tea meaningless!

Question 6: Can moldy tea be drunk after washing?

Taking a bath and drinking tea is really superstition. Just after the first course, tea can't wash away pesticide residues. As soon as I turned around, someone said that there was a little moldy Pu 'er tea at home. Wash it in hot water and soak it again, so you won't feel moldy. I believe it is drinkable.

Moldy tea leaves, no matter how many times they are washed with hot water, can't wash away the harmful mycotoxins on them. Please don't give yourself courage. I believe that even Fish Leong himself dare not drink this kind of tea.

When you encounter moldy tea, throw it away! In addition, it should be reminded that the yellow plaque in some black tea (mostly Anhua black tea) is actually golden flower, that is, ascomycete, not mold, so it can be safely drunk.

There are occasionally golden dragons in Pu 'er tea cakes. Of course, some white teas have also started to use this flower delivery technology, so it is also possible for you to meet Jinhua white tea. Are you really not sure that you can take photos and send them to your friends who know tea to help you identify them?

Question 7: I actually stuck the teacup on the table when I took it away. Did you add sugar to the tea?

Many friends who have just had tea will find that if the cup is left on the table for a long time, it will feel sticky when you pick it up after air drying, and there will be slightly sticky tea stains on the table.

This is actually caused by polysaccharides in tea (mainly composed of sugar, protein, pectin, etc.). ), and the content of polysaccharide is dry tea stains. If you are not at ease or in doubt, you can lick the sweetness. ?

(Be careful when no one is around) However, the content of polysaccharide is related to the variety of tea tree, the maturity of tea tip, the change of technology and the water solubility of pectin, which cannot be summarized in a word. But what is certain is that these substances will affect the thickness, smooth taste and consistency of tea soup, and will also increase the sweetness of tea soup, which is an important substance affecting the flavor of tea.

Question 8: Is the white mist on the tea soup a "dirty thing"?

A layer of white fog on the surface of tea soup is generally formed by hot air and cold air under different air pressures.

Just because the density of tea soup is high, water vapor can't be mixed into tea soup as quickly as pure water after it is made, and the color of tea soup is dark, so the white fog on the noodle soup can be seen clearly.

Question 9: There is foam in the tea soup! Is this a bad tea-making technique or pesticide residue?

For the clean and rich tea foam, it is actually caused by "tea saponin" Tea saponin will produce persistent foam similar to soap solution when it vibrates in aqueous solution. But the content is extremely low, which has little effect on the taste.

Moreover, tea saponin can hinder the activity of pancreatic lipase, so it can reduce the absorption of fat in food by intestine and have the effect of losing weight. In addition, it also has certain physiological activities in antibacterial and anti-inflammatory aspects.

Of course, if it is a foam that doesn't look clean and comfortable, it may be caused by too many impurities in dry tea or broken tea powder.

Question 10: Why does my tea become turbid and precipitate after a period of time?

Don't get excited, this is actually a normal phenomenon of "muddy after cooling"-tea has been in a free state for a while and melted into water, so some substances contained in it look clear and bright at high temperature; However, when the temperature drops, a complex is formed, and with the increase of association degree, the tea soup changes from clear to turbid.

In fact, if you reheat the tea soup at this time, it will become clear and bright again. Moreover, it is worth mentioning that not all tea will be turbid after cooling, which is related to the freshness and strength of tea soup.