① diuresis. Under the combined action of caffeine and aromatic substances in black tea, renal blood flow increases and diuresis occurs.

② Anti-inflammatory and sterilization. Polyphenols in tea have anti-inflammatory effects, so it is beneficial for patients with bacillary dysentery and food poisoning to drink black tea, and strong tea is also often used to smear wounds, bedsores and beriberi.

3 Strong bones. On May 13, 2002, the American Medical Association published a survey of 497 men and 540 women in recent years, pointing out that people who drink black tea have stronger bones, and polyphenols in black tea (also in green tea) have the activity of inhibiting and destroying bone cell substances.

④ Anti-aging. The antioxidant effect of tea is particularly beneficial to heart health. American magazines report that black tea has stronger anti-aging effect than garlic, broccoli and carrots.

⑤ Nourish and protect the stomach. Black tea is completely fermented tea, which will not only hurt the stomach, but also nourish it. Drinking black tea with sugar and milk often can protect gastric mucosa.

6 anti-cancer. It is generally believed that the anticancer effect of tea is mainly manifested in green tea. Studies have found that black tea, like green tea, has a strong anti-cancer effect.

⑦ Vascular relaxation. Drinking 4 cups of black tea a day can increase vasodilation in patients with heart disease. Japanese osaka city university experiment indicated that after drinking black tea for one hour, the heart blood flow velocity increased, and black tea had a strong role in preventing and treating myocardial infarction.