As for the shelf life of tea, different manufacturers have different standards. Some green tea production companies do not write a shelf life on the packaging, some write a shelf life of 12 months, and most of them write a shelf life of 18 months; the shelf life of black tea is mostly 3 years; dark tea, including green brick tea and Pu'er raw tea , Pu'er ripe tea, etc. do not have a shelf life written on them.

In fact, the quality of tea is easily affected by temperature, light, and humidity. If not stored properly, the tea will lose its original tea flavor, and the taste, aroma, and soup color will deteriorate, or even deteriorate.

To determine whether tea has expired, there are mainly the following aspects: whether it is moldy or has a stale smell; whether the green tea has turned red and the soup color has turned brown and dark; the concentration, astringency and freshness of the taste The coolness will decrease. In addition, check the shelf life on the packaging. In addition, if it is loose tea, it is best not to brew it after 18 months.

Extended information:

Common tea shelf life:

1. Green tea. Green tea has the shortest shelf life. Generally speaking, the shelf life is about 1 year at room temperature. Of course, if you are rich and have a refrigerator specially designed to store green tea, the shelf life can be extended to about 18 months.

2. Black tea. Black tea has a relatively long shelf life and can be stored for more than 2 years. However, generally speaking, even if it is stored properly, the taste will change after more than 2 years, so try not to wait until 2 years later before drinking it.

3. Oolong tea. Oolong tea generally lasts about 18 months if kept in the refrigerator. And those that have been roasted, like that, can still be drunk even if they are stored for 2 years.

4. White tea. "One-year tea, three-year medicine, seven-year treasure" white tea has the characteristic that the longer it is stored, the value and taste will increase instead of decreasing. Of course, this refers to the case of proper storage, otherwise no matter how good the tea is, it will become dregs.

5. Dark tea. Dahei tea also has unique characteristics. It can be stored for a long time in a clean, moisture-proof and odor-free environment. However, due to the age, there is no unlimited potential like Shengpu and white tea. Generally speaking, the taste of loose tea has reached its optimal level after 3 to 5 years.

6. Yellow tea. As the most low-key and least noticeable yellow tea, the production process only adds a dull yellow color compared to green tea. Its shelf life has not been significantly improved due to the dull yellow color. About 1 year, that’s about it.

7. Pu'er tea. As the most popular Pu'er tea in recent years, its unique characteristics have been "speculated" by collectors. For mature tea, it is generally more than 15 years old.

People's Daily Online-Does tea have a shelf life? This kind of tea has the longest shelf life