No.

Of course you cannot drink tea after it has expired. Each type of tea has a shelf life. I hope everyone can drink it within the shelf life. After the tea leaves expire, mold is likely to form and the nutritional value is lost. If the expired tea leaves are brewed and the tea leaves are soaked in water, when the water temperature drops, bacteria will corrode the tea leaves and produce microorganisms, which will harm human health.

How to determine whether the tea has expired: the tea has become moldy, or the taste has changed, the color of the tea soup has turned dark or brown, and the concentration and freshness of the tea have weakened. The above phenomena all indicate that the tea has expired.

Extended information:

Notes:

As many as 28 types of amino acids have been found in tea, most of which are necessary for the human body. Amino acids have high water solubility, which gives tea soup a fresh and sweet taste. Especially theanine is an important component in forming the aroma and freshness of tea.

Tea is rich in vitamins, and its content accounts for 0.6% to 1% of the total dry matter. Vitamins are divided into two categories: water-soluble and fat-soluble. Among them, the vitamin content is the highest, especially in high-grade Longjing tea.

People's Daily Online - Expired green tea cannot be made into black tea