Compared with those who drink colored drinks that look like tea, people who drink five cups of black tea every day have lower LDL (7% ~ 1 1%). Low density lipoprotein is called "bad cholesterol", which increases the risk of heart disease. Because the diet structure of the subjects was controlled in advance, experts believe that drinking black tea can lower cholesterol.

Other functions of black tea:

Prevention of osteoporosis

Black tea contains a variety of water-soluble vitamins and is also rich in trace element potassium. After brewing, 70% potassium can be dissolved in tea. Studies have shown that potassium can not only enhance the blood circulation of the heart, but also prevent or reduce the consumption of calcium in the body. In addition, manganese contained in black tea is also one of the indispensable elements in bone structure. Therefore, drinking black tea often is beneficial to bone building and preventing calcium loss.

Extended data:

The disadvantages of drinking black tea

1, Excitement: Black tea is good for refreshing, but not everyone can drink it. Caffeine may lead to arrhythmia and even death if people with heart disease drink it.

2. New tea is not good: people may think that new tea may be better than fermented black tea, but it is not. The newer black tea is, the worse it is, because there are too many substances in unfermented tea that have not yet begun to oxidize. Although it is not very harmful to human body, it is very harmful to people with gastrointestinal diseases.

References:

People's Daily Online-Drinking black tea in winter can prevent diseases, reduce strokes and lower cholesterol.

References:

People's Daily Online-Black Tea Ranking: Advantages and Disadvantages of Drinking Black Tea