Overview

Black tea is a product made from the Camellia sinensis plant. The aged leaves and stems are used to make medicine. Green tea, which is made from fresh leaves of the same plant, has some different properties.

Black tea is used for improving mental alertness as well as learning, memory, and information processing skills. It is also used for conditions such as headache, both low and high blood pressure, preventing Parkinson disease, and many others, but there is no good scientific evidence to support these uses.

In foods, black tea is consumed as a hot or cold beverage.

How does it work ?

Black tea contains 2% to 4% caffeine, which affects thinking and alertness, increases urine output, and may reduce the symptoms of Parkinson disease. It also contains antioxidants and other substances that might help protect the heart and blood vessels.

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