Drinking tea has now become a habit for many people. It not only cultivates the mind and spirit but also helps prevent diseases. However, Traditional Chinese Medicine emphasizes timely nourishment according to seasonal changes, and the same applies to tea drinking: flower tea in spring, green tea in summer, oolong tea in autumn, and black tea in winter. Traditional Chinese Medicine believes: "The way of health preservation in winter lies in keeping warm and protecting against the cold." Black tea can enhance the body's ability to resist cold, warm the stomach, and aid digestion.

1. Nourishing and Protecting the Stomach

Black tea is particularly effective in warming and nourishing the stomach. Drinking green tea on an empty stomach can cause discomfort because an important substance in tea leaves—tea polyphenols—has an astringent property that can irritate the stomach, especially when empty. However, black tea, being fermented, has a higher conversion of polyphenols, resulting in less irritation to the human gastrointestinal tract. Moreover, the oxidation products of tea polyphenols—such as theaflavins and thearubigins—can also promote digestion. Therefore, black tea not only does not harm the stomach but can actually nourish it. According to TCM theory, black tea is warm in nature, making it more suitable for people with a cold stomach.

Additionally, the rich protein, sugars, and other nutrients in black tea can enhance the body's ability to ward off cold, accumulate yang energy, and generate warmth to heat the stomach.

It is worth mentioning that broken black tea retains 55%-65% of its tea polyphenols, while most Gongfu black tea retains less than 50%. Gongfu black tea has a better mellow taste and a more pronounced stomach-warming effect.

2. Preventing Parkinson's Disease

According to a study published in the American Journal of Epidemiology, scientists from the National University of Singapore surveyed about 63,000 Singapore residents aged 45-74 and found that those who drank at least 23 cups of black tea per month had a 71% lower chance of developing Parkinson's disease compared to others. The antioxidants in black tea play a significant protective role in reducing the risk of Parkinson's disease. Experiments have shown that the amount of antioxidants released from two cups of black tea is equivalent to that in 4 apples, 7 glasses of orange juice, 5 onions, or 12 glasses of white wine. A spokesperson for Parkinson's UK stated that these research findings are very promising and that effective components for preventing Parkinson's disease could potentially be extracted from black tea in the future.

3. Combating Influenza and Anti-bacterial & Anti-inflammatory

When temperatures drop, people are most susceptible to colds. Drinking more black tea at this time can help prevent them. Japanese researchers have experimentally proven that black tea, even diluted to five times the normal drinking concentration, can still deactivate 99.999% of influenza viruses. This is because theaflavins in black tea can kill toxic bacteria in food and render influenza viruses non-infectious. Therefore, gargling with black tea daily can prevent colds and flu.

Furthermore, substances in black tea such as tea polyphenols and their oxides, aromatic compounds, and saponins have the ability to inhibit and kill bacteria, molds, fungi, pathogens, and provide anti-inflammatory and analgesic effects.

4. Preventing Heart Disease

Studies show that the incidence of coronary heart disease is significantly lower in people who drink more than 3 cups of black tea daily compared to those who do not drink tea. One hour after drinking black tea, blood flow velocity in the heart's blood vessels improves, which can prevent myocardial infarction. This is because black tea is rich in tea pigments (such as theaflavins and thearubigins), which have strong anti-lipid oxidation effects, inhibit vascular lipid peroxidation and platelet aggregation, thereby preventing coronary heart disease or stroke, lowering harmful low-density lipoprotein levels, and achieving the effect of preventing heart disease. Therefore, black tea is superior to green tea in preventing cardiovascular accidents.

5. Lowering Blood Pressure and Preventing Blood Clots

Drinking black tea can improve the function of vascular endothelial cells in the heart and other parts of the body. This improvement has been shown to help regulate blood flow, and endothelial dysfunction is one of the main causes of atherosclerosis. Tea pigments can also improve microcirculation, ensure normal supply of blood, tissue, and oxygen, inhibit platelet adhesion and aggregation, act as anticoagulants, antithrombotics, and anti-atherosclerotic agents, protecting the cardiovascular system and preventing thrombosis.

Simultaneously, tea pigments, tea polysaccharides, and other components in black tea can relax blood vessels, enhance vascular elasticity, and dilate blood vessels, thereby slowing the heart rate and adjusting blood pressure to normal levels.

6. Preventing Skin Diseases

Drinking black tea can effectively reduce the chance of developing skin cancer. Researchers conducted experiments on mice in the laboratory, proving that when exposed to excessive ultraviolet radiation, mice that drank black tea had 54% less skin damage or cancer incidence compared to mice that only drank water. In a comparative experiment between black tea and green tea, it was found that mice drinking black tea had a much lower incidence of skin cancer than those drinking green tea. This is the first confirmation that black tea has stronger cancer-preventive effects than green tea in preventing skin cancer.

7. Preventing Allergies

Drinking black tea can prevent allergic rhinitis and bronchial asthma caused by pollen and alleviate symptoms triggered by allergies.

A study by the University of Colorado on mice had a similar finding: theaflavins unique to black tea can reduce related allergic reaction conditions in people with sensitive skin. When a person develops an allergy, antigens invade the body, causing lymphocyte reactions and antibody release. When antigens invade again, complex antigen-antibody reactions occur within cells, leading to allergic symptoms. Black tea can inhibit the production of anti-allergy antibodies, preventing allergies.

8. Reducing Harmful Cholesterol

A new study shows that drinking black tea not only reduces the level of harmful cholesterol in the body but may also decrease the risk of heart disease.

Scientists from the U.S. Department of Agriculture found that consumers who drank black tea continuously for three weeks experienced a 7% to 11% reduction in their low-density lipoprotein (LDL), the so-called "bad" cholesterol.

9. Preventing Osteoporosis

On May 13, 2002, the American College of Physicians published a survey of 497 men and 540 women over 10 years, indicating that people who drink black tea have stronger bones. The polyphenols in black tea (including their oxidation products) have the ability to inhibit substances that destroy bone cells.

10. Comparison of Polyphenol Content in Different Foods

To prevent and treat common osteoporosis in women, it is recommended to drink a small cup of black tea daily, with noticeable effects after several years. Adding lemon to black tea can strengthen bones with even better results. Various fruits can also be added to black tea for a synergistic effect. A cup of fragrant and mellow black tea can leave a pleasant aftertaste and stimulate saliva. It not only provides aesthetic enjoyment but also offers miraculous health benefits.