What you bought is Eucommia ulmoides tea with spring buds, which has been oxidized and blackened (storage is not a quality problem), and the effective components such as chlorogenic acid have been degraded. How can it be effective if there are few active ingredients? Eucommia ulmoides Oliv Tea is not suitable for fermentation. Although Eucommia ulmoides Oliv. was mentioned in China Tea Classic. Tea can be made into black tea, and the fermentation process will degrade the effective components of Eucommia ulmoides Oliv. Tea, its efficacy will become unsatisfactory.

Eucommia ulmoides tea has no toxic side effects and can be drunk for a long time.

After reading the previous answer, the questioner was confused and pretended to understand the mistake.