Is drinking tea harmful? Please, 3Q

Do not drink too much, tea has a health care effect.

Is the fresher the tea, the better?

When it is said that the fresher the tea, the better, in fact, it mainly refers to green tea. Because green tea used to be more difficult to keep fresh, often after summer, the tea leaves will slowly turn yellow, and the taste is relatively poor. Now the preservation technology of tea has been relatively advanced, especially some large tea estates, often have cold storage and other preservation conditions, which can extend the freshness period of new tea, therefore, drink and buy, generally can ensure freshness.

The identification of new tea and old tea is mainly based on its color, aroma and taste. Color refers to the fact that during the storage process of tea leaves, under the action of oxygen and light in the air, green tea gradually turns from the verdant green of new tea to ash. The black tea turns from the black of the new tea to the gray-brown.

In terms of taste, the new tea is fresh, the taste of the old tea is light, slightly bitter, and the aroma has changed from light fragrance to light and turbid. However, this difference is specific to each type of tea, and if the storage conditions are good, this difference will be relatively small.

Is it best to change tea every two hours?

On the issue of pesticide residues in tea, the pesticide content of spring tea is much less, and the pesticide residues of summer and autumn tea are relatively more.

Just looking at the shape, color, and smell of the tea, it is almost impossible to distinguish whether the tea has pesticides, and it can only be tested by professional testing. However, for the vast majority of tea, it is normal to contain pesticides, as long as the pesticide residue is controlled within the national standard, it is a safe product for the human body. Other ingredients, such as lead in tea, are almost insoluble in tea soup when brewed, and most of the residual pesticide components contained in tea brewed with ordinary water within two hours cannot be brewed.

Therefore, there are two things to remember: one is not to chew the tea leaves, and the other is not to change the tea leaves from morning to night. It is still relatively safe to drink tea in this way.

withWhen boiling water to make tea, there is often a lot of foam in the first cup, what is going on? Shouldn't you drink the first cup of all tea?

The foam that appears in the tea during brewing is mainly due to the tea containing tea saponin, which has a strong foaming ability, and is also related to the pectin in the tea. Sometimes, you'll see something like oil floating in the first cup of tea, which has something to do with the water used to make the tea. It is best to use soft water, such as purified water, to make tea.

It can be said that the foam of tea leaves is not a dirty thing, because dust does not form foam. The foam has nothing to do with the quality of the tea.

There is a saying that "the first soup, the second tea", it is true that the tea is the second and third is more fragrant, and some people pour out the first tea, which is called "washing tea". In fact, the word tea washing is more widely used in oolong tea, especially the kung fu tea of Chaozhou. Its purpose is twofold, through soaking, some substances on the surface of the tea leaves, such as tea ash, etc., are washed off, and in addition, through soaking, it helps to reduce the fire power of tea and promote the emanation of aroma.

In fact, the first cup of tea does not have to be poured out, especially for tea customers who usually do not use special tea utensils, but put the tea leaves directly in the cup to drink.

Many people drink tea into a misunderstanding.

This misconception is that the first brew of any tea must be thrown away. The first shot doesn't require much water, as long as the water can soak all the tea leaves.

The function of the first shot is to remove dust and dirt, and this bubble does not need to take too long. The second bubble is the real taste enjoyment.

When drinking tea, there are the following misunderstandings that cannot be touched, first, new tea should not be drunk in a hurry. It may cause adverse reactions such as gastrointestinal discomfort, diarrhea and abdominal distension after drinking, and it is easy to excite the nervous system, causing "drunk tea" phenomena such as limb weakness, cold sweat and insomnia. Second, don't drink tea right after a meal.

It causes the undigestible protein and tannic acid in the stomach to combine into a non-digestible coagulated substance, which affects protein absorption. Third, do not drink strong tea or hot tea. Frequent and repeated burns can easily cause epithelial cell mutations and become a hidden danger of cancer.

Fourth, tea and medicine should not be drunk at the same time.