Green tea is within the shelf life. You can look at the packaging behind the green tea at home. If the shelf life is over, the taste will change easily. Of course, the taste here will get worse, not more and more fragrant. The nutrients of green tea will be greatly reduced. Even if you drink it, it will not be good for your health. On the contrary, it may cause gastrointestinal discomfort due to deterioration, such as diarrhea, abdominal pain and increased urination.

Extended data:

Precautions:

For some white-collar workers who often sit in offices, they often drink tea all morning or even all day. However, if tea leaves are soaked in water for a long time, not only the aroma will be damaged, but also the taste will become bitter, and the delicate flavor and mellow fragrance of green tea will not be drunk.

Although there is no high requirement for the brewing temperature of good famous green tea, if you want to have a better taste, you can control the water temperature at 80℃~90℃. The green tea brewed in this way has a sweet aroma and fresh taste, which can effectively improve the taste.

Baidu encyclopedia-green tea