Can tea be frozen and stored?

Tea can be frozen for storage, but it depends on the type of tea and storage conditions to determine whether it is suitable for freezing. Green tea, light aroma oolong tea, etc. are suitable for frozen storage, while highly fermented black tea, black tea, etc. are not recommended to be frozen. Cryopreservation can effectively delay the oxidation of tea leaves, especially for unfermented teas such as green tea. The oxidation rate of polyphenolic substances in tea is significantly reduced at low temperatures, and the aroma components are more stable. Before freezing, the tea leaves should be divided into small portions and sealed in aluminum foil bags or cans to isolate moisture and odors, avoiding repeated thawing and frost formation. The recommended freezing temperature is below minus 18 degrees Celsius, and the storage time is generally not more than 12 months.

Fermented tea may affect flavor activity after freezing. During the freezing process of fully fermented or post fermented teas such as black tea and Pu'er tea, the internal water crystallization of the tea may damage the cell structure, and the taste may become lighter and the aroma may be lost after thawing. This type of tea is more suitable for storage at room temperature in a dark sealed environment, utilizing the natural transformation of the tea's active ingredients. If partially fermented oolong tea needs to be stored for a long time, it can be frozen for a short period of time but should not exceed 6 months.

After removing frozen tea leaves, they should be allowed to stand at room temperature before opening to prevent condensation from soaking the tea leaves. Small packaged tea for daily consumption does not need to be frozen, it can be sealed in a cool and dry place. Regardless of the storage method used, tea should be kept away from odors, moisture, and direct sunlight. After opening, it should be consumed as soon as possible to ensure the best flavor.