2. Reduce fat and lose weight. Tea polyphenols and their oxidation products in black tea can dissolve fat and promote the discharge of lipid substances, thus reducing the contents of total cholesterol, free cholesterol, low-density lipoprotein cholesterol and triglyceride in blood, thus reducing cholesterol deposition on arterial wall and reducing the incidence of arterialization. It can also activate protein kinase, accelerate fat decomposition and reduce body fat content.
3, anti-oxidation, anti-aging, longevity. Catechins, theaflavins, theanine and tea polysaccharides in black tea, especially high-content compound flavonoids, all have the function of scavenging free radicals, so the efficacy and function of black tea have the functions of antioxidation and delaying cell aging.
4. Lower blood pressure and blood sugar. Theanine in black tea can inhibit the increase of blood pressure, while alkaloids and flavonoids can relax the wall of blood vessels, increase the effective diameter of blood vessels, and reduce blood pressure by relaxing blood vessels.
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Matters needing attention
1, avoid drinking tea after meals. Tea contains a lot of tannic acid, which can react with iron in food to form new substances that are difficult to dissolve. Over time, it will cause iron deficiency and even induce anemia. Therefore, the correct drinking time is: one hour after meals.
2, avoid drinking tea with fever. Tea contains theophylline, which can raise body temperature. Drinking tea for patients with fever is tantamount to "adding fuel to the fire".
3, avoid drinking new tea. Fresh tea has a short storage time and contains more unoxidized polyphenols, aldehydes and alcohols, which has a strong stimulating effect on human gastrointestinal mucosa and is easy to induce stomach diseases. Therefore, drink less black tea and avoid new tea that has been stored for less than half a month.
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