1, hypertension should not drink strong tea.
The first tea with less than 50 ml of water per gram of tea is called strong tea. After patients with hypertension drink strong tea, caffeine in tea has an exciting effect, which will cause blood pressure to rise, which is not good for health.
2, coronary heart disease must be cautious when drinking tea.
Caffeine and theophylline contained in tea are stimulants, which can speed up the heartbeat and enhance the heart function. If patients with coronary heart disease with excessive heart rate, atrial fibrillation or premature beats drink it, it is easy to induce medical history and aggravate the condition, so it is recommended that such people drink some light tea. For patients with coronary heart disease whose heart rate is low and the heart rate is less than 60 beats per minute, drinking more tea can increase the heart rate and play an auxiliary role in drug treatment.
3, liver patients avoid drinking tea.
After patients with liver drink strong tea, caffeine and other substances in tea usually go through liver metabolism, which leads to increased burden on liver and easy damage to liver tissue.
4, urolithiasis patients should not drink tea.
The main cause of urinary calculi is the formation of calcium oxalate stones that cannot be discharged in the human body. After patients with urinary calculi drink tea, oxalic acid in tea will combine with calcium in human urine excreta to form calcium oxalate, which will aggravate the condition.
5, neurasthenia, drink tea carefully
Patients with neurasthenia need to be cautious when drinking tea because this kind of people are more sensitive to caffeine in tea. If they drink tea in the afternoon or evening, it will easily cause insomnia and make the symptoms of neurasthenia more serious. It is suggested that these people drink scented tea in the morning and green tea after lunch, and never drink tea at night. This will make people feel better in the daytime and calm at night, which will help improve their condition.
6. Patients with gastric ulcer should drink tea carefully.
The chemical components in tea will stimulate the stomach to increase the secretion of gastric acid. After drinking strong tea, patients with gastric ulcer will become more irritating to the ulcer surface and the wound will become larger, which is the deterioration of the condition. The suggestion for patients with mild gastric ulcer is that they can drink black tea with milk and sugar 2 hours after swallowing the medicine, which has certain effect on the healing of gastric ulcer, because this kind of light tea has the effect of diminishing inflammation and protecting gastric mucosa.
7, anemia patients should not drink tea.
Tea contains tannic acid that combines with iron to form insoluble compounds. Anemia patients can't get enough iron to synthesize hemoglobin after drinking tea, and the symptoms of iron deficiency anemia patients will be more serious. The chemical components contained in tea have the function of decomposing fat, and the decomposition of fat will be more serious for malnourished people after drinking it, and the malnutrition of the body will be more serious. Children drinking tea will also affect their growth and development due to iron deficiency.
8. Pregnant mothers should not drink strong tea.
Tea polyphenols and caffeine in tea are irritating substances. After pregnant women drink strong tea, it will be unfavorable to the growth of the fetus in the abdomen and even affect the development of intelligence. To be conservative, we should put an end to the stimulation of caffeine and other chemical components to the fetus during pregnancy. After breast-feeding mothers drink strong tea, caffeine, tea polyphenols, etc. will follow the secretion system into breast milk, and babies will be easily excited, insomnia and crying after taking it.
9. Old people should not drink raw tea.
Raw tea refers to green tea that destroys the oxidase activity in tea by frying, steaming and running, inhibits the oxidation of tea polyphenols and softens tea leaves, but is directly dried without kneading. The tea produced by this method has a green appearance and a stronger green fragrance than fresh leaves. The aldehyde and alcohol compounds contained in tea are similar to fresh leaves. Drinking this kind of tea for the elderly will stimulate the gastric mucosa and easily lead to stomach pain. Even young people will have the feeling of scraping their stomachs after drinking it. It is recommended to buy this kind of raw tea and stir-fry it with low fire before soaking it.
10, the efficacy of drinking tea
1, relieve fatigue
Drinking tea can excite nerves and eliminate fatigue, which is the effect of tea element. Tea element can not only refresh the mind, but also stimulate muscle contraction, increase blood circulation, excite nerves and drive away drowsiness.
2, diuretic effect
Tea has the functions of sweating, diuresis, quenching thirst and relieving summer heat. Tea tannin has the effect of promoting fluid production and quenching thirst. Tea element can stimulate renal blood vessels, make them swell, and accelerate urine excretion.
3, hangover effect
Tea has the effect of relieving alcohol and tobacco poison. Tea tannin and alkaloid combine to form white crystal precipitate, which can detoxify tobacco poison through chemical reaction, alcohol poison through diuresis, and alcohol can be neutralized by caffeine, so it is reasonable for people to use strong tea to detoxify alcohol.
4. Promote digestion
Drinking tea can help digestion and dissolve fat, and tea aromatic oil can get rid of greasy, _ stomach. Tea can also eliminate the odor in the mouth, such as eating garlic, green onions, crabs, etc., as long as you chew some thousand tea leaves in your mouth or drink some strong tea, you can remove the odor.
5, sterilization
Tea tannin has certain bactericidal effect. Tannin combined with protein on the surface of bacteria can form a white precipitate film, which can inhibit the reproduction and activity of bacteria. In particular, it is particularly lethal to typhoid bacteria and dysentery bacilli. So people who drink tea regularly can get less diseases.