As we all know, tea drinking culture in China has a long history and has been passed down to modern times. Many people are used to making a pot of tea and savoring it every day, among which black tea is deeply loved by the public. Let me talk about the efficacy and side effects of black tea.
Efficacy and side effects of black tea 1 efficacy of black tea
First, anti-oxidation and anti-aging
In the past five years, the US government has funded more than 65,438+050 studies on green tea and black tea and their chemical compositions. The results show that antioxidants in green tea and black tea can completely destroy the circulation path of chemicals in cancer cells.
Dr Murray Mitelman, director of vascular epidemiology at Beth Israel Deaconess Medical Center in Boston, said, "The efficacy of black tea and green tea is almost crucial, but the antioxidant effect of black tea is much greater than that of green tea, especially beneficial to the heart." American magazines report that black tea has stronger anti-aging effect than garlic, broccoli and carrots.
Second, strong bones.
On May 13, 2002, the American Medical Association published an observation on 497 men and 540 women 10 for many years, pointing out that people who drink black tea have strong bones, and polyphenols in black tea (including green tea) can inhibit the vitality of bone cells.
In order to prevent and treat female osteoporosis, drinking a small cup of black tea every day has achieved remarkable results for several years. If lemon is added to black tea, the bones will be strengthened and the effect will be stronger. Various fruits can also be added to black tea, which can play a synergistic role.
Third, relax blood vessels.
Recently, there is also a study on black tea in American medical field. It is found that the vasodilation function of patients with heart disease can be improved from 6% to 10% when drinking 4 cups of black tea every day, and the vasodilation function of ordinary people will be improved by 13% after stimulation.
Fourth, nourish and protect the stomach.
If you don't eat and drink green tea, your stomach will be uncomfortable. This is because tea polyphenols, the main substance contained in tea, have astringent taste, have a positive stimulating effect on the stomach, and are more irritating in a full environment.
Black tea is different. After fermentation and baking, tea polyphenols produce enzymatic oxidation reaction under the action of oxidase. When the contents are eliminated, the irritation to the stomach will be reduced. Black tea will not only hurt the stomach, but also nourish it. Drinking black tea with sugar and milk often can diminish inflammation, cover gastric mucosa and have a positive effect on treating ulcers.
Verb (abbreviation for verb) fights cancer.
It is very popular that tea has anti-cancer effect, and researchers all over the world have done a lot of exploration on it. However, it is generally believed that the anticancer effect of tea is important in green tea, but now there is new hope.
It is found that black tea, like green tea, has a strong anticancer effect.
Six, anti-inflammatory sterilization
Polyphenols in black tea have anti-inflammatory effects. Experiments show that catechin can combine with unicellular bacteria to make protein agglutinate and precipitate, thus inhibiting and eliminating pathogenic bacteria. Therefore, for patients with bacillary dysentery and food poisoning, drinking black tea is quite beneficial, and strong tea is also commonly used by the people to smear wounds, bedsores and athlete's foot.
Seven, detoxification
Experiments show that tea polyphenols in black tea can adsorb heavy metals and alkaloids, and carry out precipitation analysis, which is good news for modern people whose drinking water and food are polluted by industry.
Eight, promoting fluid production and clearing heat
Drinking black tea on a hot day can quench thirst and relieve summer heat because polyphenols, sugars, amino acids and pectin in tea react with saliva, which stimulates saliva excretion, makes the mouth feel moist and gives birth to a cold feeling. At the same time, caffeine regulates the body temperature in the hypothalamus, and also stimulates the kidney to promote the secretion of heat and dirt, maintaining the physiological balance in the body.
Nine, diuresis
Under the combined action of caffeine and aromatic substances in black tea, the renal blood flow increases, the glomerular filtration rate increases, the renal microvascular dilates, and the reabsorption of water by renal tubules is inhibited, thus contributing to the increase of urine output.
It is beneficial to remove lactic acid, uric acid (related to gout), excessive salt (related to hypertension) and harmful substances. Relieve edema caused by heart disease or nephritis.
Ten, refreshing.
After the invention of medical experiments, caffeine in black tea stimulates the cerebral cortex? Onions break through the center, promoting the combination of refreshing and thinking, thus making the brain more responsive and increasing memory.
It also has a pleasant effect on the vascular system and the heart, strengthens the heartbeat, thus accelerating blood circulation to facilitate metabolism, and at the same time promoting sweating and diuresis, thus opening the bow left and right to accelerate the secretion of old and waste substances in the body, such as lactic acid (a substance that makes muscles feel tired), and achieving the effect of relieving fatigue.
Side effects of black tea
After the invention of medical experiments, caffeine in black tea can stimulate the pleasant nerve center of cerebral cortex, promote the combination of refreshing and thinking, thus making the brain more acute and strengthening memory. It also has a pleasant effect on the vascular system and the heart, strengthening the heartbeat, thus accelerating blood circulation and promoting metabolism.
At the same time, it can promote sweating and diuresis, thus accelerating the secretion of old and waste substances such as lactic acid (a substance that makes muscles feel tired) and achieving the effect of relieving fatigue.
Black tea is warm and not suitable for people who get angry. Drinking black tea for a long time will make the stomach cold, and the stomach will never be as strong as before. Occasionally, the kidneys will be cold and painful, and others will breed palpitations and relieve the body's absorption rate of calcium.
Efficacy and side effects of black tea 2 Efficacy and function of black tea
be diuretic
Black tea contains caffeine and aromatic substances. After drinking black tea, people may increase the blood flow to the kidneys and promote urination. People with gout and hypertension are suitable for drinking black tea in moderation. The diuretic effect of black tea is beneficial to relieve edema.
sterilizing effect
Black tea contains polyphenols, which has anti-inflammatory effect. To deal with people with inflammation, it is likely to be food poisoning, and you can drink black tea in moderation. Catechins in black tea can also combine with bacteria and inhibit the growth of bacteria.
Detoxification effect
There are probably some heavy metal residues in the human body. Tea polyphenols in black tea may adsorb heavy metals in the human body, which is beneficial to human health. Therefore, people exposed to heavy metals for a long time may promote the elimination of toxins in the body.
recover one's spirit
When you feel tired, you can drink black tea in moderation. The nutrients in black tea may stimulate the pleasant nerve center in the body and have a refreshing effect. Black tea can also improve blood circulation and metabolism in the body, which is beneficial to relieve fatigue. When you are under high pressure for a long time, you can drink black tea in moderation.
Heat clearing effect
On a hot day, the surface temperature is high, and drinking black tea in moderation still has a good summer effect. Black tea contains a variety of phenols and amino acids, which is beneficial to stimulate saliva excretion in the mouth and has the effect of clearing heat.
See if black tea has many functions and effects. Black tea has many other uses. If you want to know, you can go to the black tea section of this website to learn more.
Taboos for eating black tea
The utility and function of black tea are many, nothing more than the time of drinking black tea, and some topics should be cautious. For example, patients with stones are likely to be cancer patients, so it is not suitable for drinking black tea.
Some people have symptoms of blood deficiency, probably because they often suffer from insomnia, so they don't start drinking black tea again. Black tea is a warm food and is not suitable for people who get angry.