2. Black tea is a kind of fully fermented tea, which is brown in color and bright and red in color, hence the name black tea. Black tea has the functions of refreshing the brain and clearing the head. It is also said that black tea also has health care functions such as invigorating the stomach, promoting digestion, reducing swelling and diuresis, removing toxic substances and strengthening bones.

3. The taste of tea is different, which is determined by the processing process and fermentation degree of tea, including coolness, neutrality and warmth. Generally speaking, cool tea includes Biluochun in green tea and Tieguanyin in green tea, neutral tea includes oolong tea and Dahongpao in green tea, while warm tea includes black tea and Pu 'er tea.

4, so if you drink black tea with a cold stomach, the effect will be better.