① diuresis. Under the combined action of caffeine and aromatic substances in black tea, the blood flow of kidney increases and urination is promoted.

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 commonly used to smear wounds, bedsores and athlete's foot.

3 strong bones. On May 13, 2002, the American Medical Association published a survey of 497 men and 540 women 10. It was pointed out that people who drink black tea have stronger bones, and polyphenols in black tea (also in green tea) have the activity of inhibiting substances that destroy bone cells.

④ Anti-aging. The antioxidant effect of tea is especially 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 a fully fermented tea, which not only won't hurt the stomach, but can nourish it. Drinking black tea with sugar and milk often can protect gastric mucosa.

6 anti-cancer. It is generally believed that the anti-cancer 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 Relaxation of blood vessels. Drinking 4 cups of black tea a day for patients with heart disease can increase vasodilation. Osaka city university experiment in Japan pointed out that after drinking black tea for one hour, the blood flow velocity of the heart was improved, and black tea had a strong effect of preventing and treating myocardial infarction.