how long can chinese tea leaves be kept
The shelf life of tea is related to the variety of tea, and the shelf life of different teas is also different. For example, Pu’er tea from Yunnan and brick tea from ethnic minorities can have a shelf life of 10-20 years. Similarly, Wuyi rock tea has a rich aroma and mellow taste when aged every other year. Black tea from Hunan, Fuzhuan tea from Hubei, Liubao tea from Guangxi, etc., as long as stored properly, not only will they not spoil, but they can even improve the quality of tea.
Generally, fresh tea is better. For example, green tea has a shelf life of about one year at room temperature. However, the factors that affect the quality of tea mainly include temperature, light, and humidity. If stored properly, these factors can be reduced or eliminated. This tea can be stored for a long time.
To determine whether tea has expired, there are several aspects to consider, including whether it has mold or aged, whether green tea has turned red, and whether the soup color has turned brown or dark; The concentration, astringency, and freshness of the taste decrease. In addition, the shelf life on the packaging should be checked. If it is loose tea, it is best not to drink it after 18 months.
Expired tea leaves can be soaked and placed in flower pots as nutrients for flowers. They can also be dried and used as pillows instead of buckwheat. Pillows made from tea leaves are beneficial for sleep.
How long does tea last after brewed
Tea cannot be steeped a few times. Strip tea can be steeped multiple times
The extraction rates of various active ingredients in tea vary, with amino acids and vitamins being the easiest to extract, followed by caffeine, tea polyphenols, soluble sugars, and so on.
When bar shaped tea is brewed for the first time, these soluble substances can be extracted by 50% -55%. When brewed for the second time, they can be extracted by about 30%. When brewed for the third time, they can be extracted by 10%. When brewed for the fourth time, they can only be extracted by 2% -3%. Therefore, bar shaped teas such as black tea and green tea are suitable for brewing 2 to 3 times.
Can expired tea bags make you sick
Bagged tea leaves that have expired and have not been opened are usually not suitable for continued consumption. At this time, the nutritional value of tea leaves is almost lost, and continuing to drink may lead to secondary stomach lesions, which is not conducive to one’s own health.
1. Nutritional value almost lost: Although the above-mentioned tea leaves have not been opened, they have exceeded their shelf life, deteriorated, and expired. The nutritional value of the tea leaves is almost completely lost, and their taste will also deteriorate. Therefore, it is not recommended to continue drinking.
2. Secondary gastric lesions: Expired bagged tea leaves can also harbor bacteria and mold, which should be avoided from consumption to prevent further irritation of the gastric mucosa, triggering symptoms such as nausea, diarrhea, stomach pain, and sometimes acute gastroenteritis, food poisoning, and other diseases.
