In fact, the quality of tea is easily affected by temperature, light and humidity. If it is not properly preserved, tea will lose its original flavor, and its taste, aroma and soup color will become worse, or even worse.
To judge whether the tea has expired, there are mainly the following aspects: (1) to see whether it is moldy or stale; Will green tea turn red and soup turn brown and dark? In addition to the shelf life on the package, the concentration, concentration and freshness of the taste will also decrease. In addition, if it is bulk tea, it is best not to drink it for more than 18 months.
Extended data:
Shelf life of ordinary tea:
1, green tea. Green tea has the shortest shelf life, generally speaking, the shelf life at room temperature is about 1 year. Of course, if you are a local tyrant and have a refrigerator dedicated to storing green tea, the shelf life can be extended to about 18 months.
2. Black tea. Black tea has a long shelf life and can be preserved for more than 2 years. But generally speaking, even if it is properly preserved, it will go bad after more than 2 years, so try not to wait until 2 years later.
3. oolong tea. Oolong tea is, generally speaking, if it is kept in the refrigerator, it will be preserved for about 18 months. And baked, like that, you can still drink it even after two years.
4.white tea. "1 year-old tea, 3-year-old medicine, 7-year-old treasure" white tea has its own characteristics. The longer it is stored, the more its value and taste will increase. Of course, this means that even the best tea leaves will turn into dregs if they are stored properly.
5. Black tea. Big black tea also has its own characteristics, which can be preserved for a long time in a clean, moisture-proof and odor-free environment. But because it has passed, it does not have the infinite potential of raw tea and white tea. Generally speaking, the taste of loose tea has reached the best level after three to five years.
6. Yellow tea. As the lowest-key non-existent yellow tea, the production process is more boring than green tea, and the shelf life is not greatly improved because of stuffy yellow. About 1 year, that's about it.
7. Pu 'er tea. As the most popular Pu 'er tea in recent years, its characteristics have been "fried" by collectors. Cooked tea, generally speaking 15 years old or older.
Does tea have a shelf life? This tea has the longest shelf life.