Does tea expire? Is there an expiration date for tea?

Tea leaves expire. Tea has a shelf life, but it is related to the variety of tea, and the shelf life of different tea is different. Ordinary tea, fresh is better.

For example, green tea has a shelf life of about one year at room temperature. But the main factors that affect the quality of tea are temperature, light and humidity. If the storage method is done properly, these factors are reduced or eliminated, and the quality of the tea can be guaranteed in the long term.

Pu'er tea from Yunnan, brick tea from ethnic minorities, has a good aging and a shelf life of 10 to 20 years. Another example is Wuyi rock tea, which is held every other year, with a strong aroma and mellow taste. Hunan black tea, Hubei's Fu brick tea, and Guangxi's Liubao tea, if stored properly, will not deteriorate, and can even improve the quality of tea.

Judging whether the tea is expired mainly includes the following aspects: whether it is moldy and not fresh; whether the green tea turns red, whether the soup turns brown and dark; The intensity, astringency, and freshness of the taste decrease. Also, look at the expiration date on its packaging.

Also, if it is a loose tea, it is best not to drink it for more than 18 months. Expired tea leaves can be soaked and placed in pots as nourishment for flowers. They can also be dried to make pillows instead of buckwheat.

Pillows made of tea are good for sleep.

Yes, it will expire.

Tea leaves have an expiration date, and different teas have different shelf life. For example, the shelf life of green tea is generally 1 year. Black tea belongs to the fully fermented tea category and has a longer shelf life than green tea.

Canned black tea can be stored for about 3 years, and black tea packaged in paper bags can be stored for about 2 years. On the contrary, Pu'er tea is better aged, and the shelf life can reach about 10-20 years. However, as long as the black tea in Hunan, the Fu brick tea in Hubei, and the Liubao tea in Guangxi are stored properly, not only will they not deteriorate, but they can even improve the quality of tea.

Extended content

Tea tree varieties. 1. From the classification point of view, they belong to four families:

1. Five treasures tea: Guangxi tea, Dabud tea, Guangnan tea, Wushu tea, sparse tooth tea;

2. Five-pillar tea: thick axis tea, five-pillar tea, old black tea, Dali tea, Yunnan-Burma tea, Yuanji tea, wrinkled leaf tea, Maguan tea, Hani tea, multi-petal tea;

3. Bald room tea: Mengla tea, Dehong tea, Rib tea, Pseudocalyx tea, False Turquoise tea, Rongjiang tea, Purple Fruit Tea, Multi-pulse tea;

4. Tea series: tea, bitter tea (variety), white hair tea (variant), Pu'er tea, calyx tea, pseudo-fine calyx tea, Yuanjiang tea, Gaoshu tea.

2. Tea varieties are mainly divided into two categories: group varieties and clones.

1. The group varieties are: Mengku large-leaf tea, Menghai large-leaf tea, Fengqing large-leaf tea (the above is a national-level high-quality variety), Yuanjiang glutinous tea, Yangta large-leaf tea, Zhenyuan stirrup tea, Luchun Mayu tea, Lushui large-leaf tea, Iceland large-leaf tea, Bazi Baimao tea, Yunlongshan large-leaf tea, Jinggu large-leaf tea, Tuantian large-leaf tea, Bangdong large-leaf tea, Guanzhai tea, Dachang tea, Lancang large-leaf tea, etc.

2. Four clones: It is the offspring of Yunnan large-leaf species that are selected and bred by asexual reproduction. There are mainly Yunkang No. 43 and long-leaved Baihao; Yunkang 1O, Yunkang 14; Yunmei, Yungui, Dwarf Feng, etc.; Yunxuan No. 9 and Yunkang No. 37 are all descendants of Menghai species.

3. Tea varieties.

According to the classification method of "The Book of Chinese Tea" edited by Chen Zongmao, it is divided into: green tea, black tea, oolong tea, white tea, yellow tea, and dark tea.

References Encyclopedia - Tea.

Does tea have an expiration date.

This question is a good question, but the good thing is that although many people are drinking tea, they don't know that tea has an expiration date.

So why does tea have an expiration date?

The answer to this question is this.

We know that most of the raw materials of tea are composed of plant leaves, and some are composed of plant flowers or plant fruits. No matter what kind of raw material is used to make up tea, the composition of its components should be decomposed.

Here I will tell you a commonality, that is, things that should be decomposed are easy to deteriorate, and this is also the case with tea.

The shelf life of tea is generally not more than one year, especially not more than the summer of the following year, that is, not in the hot and humid time.

The reason for this is that tea is a kind of raw material that is suitable for tide and decay. If the tea leaves pass the summer of the following year, they will rot due to the high temperature decomposition and high humidity of the summer, due to the absorption of a certain amount of moisture.

Professionals who sell tea or produce tea will store it in a low temperature place, and at the same time avoid high temperatures, but due to.

The decomposition of tea leaves, due to the long storage time, will also volatilize the active ingredients of tea. Although this kind of tea is not harmful to the human body, the taste and composition of tea are not as good as normal tea.

However, as long as there is no rotten and moldy tea, it will not be harmful to the human body, but the taste and composition of the tea are not ideal.

Different tea varieties have different shelf life, how should we buy tea in order to taste the best taste of tea.

<>1, tea will expire, tea belongs to food, all food has a shelf life, drain Bikai tea according to the variety, process, preservation methods, its shelf life is also different, the shelf life of Hui stuffy green tea is 12 months, the shelf life of black tea is 24 months, the shelf life of oolong tea is 24 months, the shelf life of black tea and white tea is 20 years, and the shelf life of yellow tea is 12 months, so the shelf life of tea will also expire.

2. The shelf life of various teas:

1) Green tea: Green tea is a non-fermented tea, which is relatively easy to deteriorate, and the general shelf life is about one year at room temperature. Depending on the degree of greening and drying, the shelf life of green tea will vary to a certain extent.

The main factors that affect the quality of green tea are temperature, light, and humidity, and if the storage method is done properly, these factors can be reduced or eliminated, and the shelf life of green tea can be moderately extended.

2) Oolong tea (green tea).

Oolong tea is a semi-fermented tea with a shelf life of 24 months. The shelf life of oolong tea depends on the moisture content of the tea itself, and the moisture-proof performance of the packaging materials used, such as Wuyi rock tea can still be drunk after 2 years, and the shelf life of aged old iron is 5 years, so as long as it is stored properly, the longer the better.

3) Black tea. Black tea belongs to the full fermentation of tea, its shelf life can be longer than green tea, the shelf life of bulk black tea, generally is 18 months, the general bagged black tea shelf life is 24 months, canned or wrapped in aluminum foil black tea can be stored for about three years.

4) Yellow tea. Yellow tea is a special existence among the six major tea categories, because there is less circulation, and its production process is similar to green tea, with an additional stuffy process. Therefore, yellow tea, like green tea, has a shelf life of only about one year.

5) Black tea. Generally speaking, black tea can be stored for a long time, but generally speaking, it tastes better after 10 or 20 years, and the tasting period is better again, and the same is true for Pu'er tea.

6) White tea. White tea is also the older the better, of course, it is also under the premise of good preservation, white tea is generally sealed and preserved, otherwise it will lose the moisture in it. White tea can also be stored for 10 to 20 years.

1. As long as the tea has passed the expiration date, it is not recommended to drink it again, because the tea will produce mildew after expiration, which will breed a large number of bacteria and viruses, and it is easy to cause gastrointestinal discomfort when drinking tea, and it will also increase the risk of liver cancer, so it is best not to drink.

2. Tea is divided into green tea, black tea, yellow tea, oolong tea, black tea, white tea, the shelf life of green tea is 12 months, the shelf life of black tea is 24 months, the shelf life of oolong tea is 24 months, the shelf life of yellow tea is 12 months, the shelf life of black tea and white tea is long-term storage, in addition, the tea is suitable for drinking within the shelf life, and the tea after expiration is not suitable for drinking.

3. For the best tasting effect, it is best to drink it within the shelf life. But the key to the quality of tea is to look at preservation, poorly preserved tea may also deteriorate before the expiration date, some tea is well preserved, even if it expires, it can still be drunk, expired and spoiled can not be equated.

1. Tea will expire, tea belongs to food, all food has a shelf life, tea according to the variety, process, preservation methods, its shelf life is also different;

2. The shelf life of green tea is 12 months, the shelf life of black tea is 24 months, the shelf life of oolong tea is 24 months, the shelf life of black tea and white tea is long, and the shelf life of yellow tea is 12 months.