It is normal to drink tea in life. Many people regard tea as their hobby, especially the elderly people like to drink tea. Everyone knows, so we drink tea every day to know what tea is. Is it good? So is it not suitable for people to drink tea? The following editor will explain in detail, I hope tea lovers can know these problems.
1. Improve muscle endurance
Drinking tea can improve muscle endurance. This is because there is also an antioxidant substance called catechin in tea, which can increase the body's ability to burn fat, improve muscle endurance, help fight fatigue, and increase the time of physical exercise. Drinking green tea often has the most significant effect.
2. Resistance to ultraviolet rays
Tea polyphenols are water-soluble substances. Washing your face with tea water can clear the greasy face, constrict pores, disinfect, sterilize, and resist skin aging. It also helps to reduce the damage of ultraviolet rays in the sun to the skin. It is a natural "sunscreen cream". ".
3. Stay in shape
The discussion about tea in "Materia Medica Supplements" of the Tang Dynasty mentioned that "long eating makes you thin", and modern scientific research has confirmed this. The caffeine in tea can promote the secretion of gastric juice, help digestion, and enhance the body's ability to break down fat. Foreign studies have also shown that regular tea drinking can reduce waist circumference and lower body mass index (BMI), thereby helping to prevent diabetes and cardiovascular and cerebrovascular diseases.
4. Resist radiation
Foreign studies have shown that tea polyphenols and their oxides can absorb some radioactive substances, protect cells from radiation damage, and are also helpful for repairing damaged cells. Clinical studies have shown that tea extracts can treat mild radiation sickness caused by tumor patients during radiotherapy, and the reduction of blood cells and white blood cells caused by radiation is very effective.
5. Improve memory
Drinking tea has a certain effect on improving memory. Studies have shown that tea polyphenols in tea can locally improve the brain, thereby increasing memory and improving learning efficiency. Foreign studies have confirmed that drinking tea can prevent and treat neurological diseases, especially senile dementia. In addition, caffeine can stimulate the central nervous system, and has the effects of refreshing, thinking, and clearing the heart.
6. Improve bone density
Although tea contains caffeine, which can promote the loss of calcium with urination, the content is extremely low. Even black tea with high caffeine content is only 30 to 45 mg per cup. In fact, tea contains more substances that help reduce calcium loss, including fluorine, phytoestrogens and potassium. A Taiwan study found that people who often drink tea have a higher bone density and a lower chance of hip fractures.
There are 7 kinds of people who are not suitable for drinking tea
1. People with constipation
People with constipation are not suitable for drinking tea, because the intestines are relatively dry during constipation, so it is suitable to eat some foods that moisturize the intestines, and some ingredients in tea have a certain astringent effect on the gastrointestinal mucosa. The digestion and absorption function of food makes stool dry and clumps, causing constipation or aggravation.
2. People with neurasthenia and insomnia
Because the caffeine in tea has an obvious excitatory effect on the central nervous system of the human body, drinking tea, especially drinking strong tea, will make the human brain in an over-excited state without rest.
Because the tannic acid in tea leaves the iron in food to form precipitates that are not absorbed by the body.
4. People with calcium deficiency or broken bones
Because the alkaloids in tea can inhibit the absorption of calcium in the duodenum. At the same time, it can also promote the excretion of calcium in the urine, making the body less calcium in and out, leading to calcium deficiency and osteoporosis, making it difficult to recover from fractures.
5. People with stomach ulcers
Because there is a phosphodiesterase in the human stomach that can inhibit the secretion of gastric acid by parietal cells, and theophylline in tea will reduce the activity of phosphodiesterase, causing the parietal cells to secrete a large amount of gastric acid.
6. Gout patients
Because the tannic acid in the tea will aggravate the patient's condition, it is not advisable to drink tea, and it is not advisable to drink tea that has been steeped for too long.
7. People with high blood pressure or heart disease
The caffeine contained in tea has a strong heart-stimulating effect on the human body, and this excitement process will affect the body's physiological activities and improve certain basic metabolism.
What are the misunderstandings of drinking tea
1. Like to drink new tea
Due to the short storage time of new tea, it contains more non-oxidized polyphenols, aldehydes, alcohols and other substances, which has a strong stimulating effect on human gastrointestinal mucosa and is easy to induce gastric disease. Therefore, you should drink less new tea, and avoid drinking new tea that has been stored for less than half a month.
2. drink tea all over
As the tea is contaminated by pesticides and other harmful substances during the cultivation and processing, there will always be a certain amount of residue on the surface of the tea. Therefore, the first time the tea has a washing effect, it should be discarded.
3.drink tea on an empty stomach
Drinking tea on an empty stomach can dilute the gastric juice, reduce digestive function, and increase the absorption rate of water, causing a large amount of undesirable components in the tea to enter the blood, causing dizziness, palpitation, weakness in hands and feet and other symptoms.
4. drink tea after a meal
Tea contains a lot of tannic acid. Tannic acid can react with the iron element in food to produce new substances that are difficult to dissolve. Over time, it can cause iron deficiency in the human body and even induce anemia. The correct way is: drink tea one hour after the meal.
5. have a fever and drink tea
Tea contains theophylline, which has the effect of raising body temperature. Drinking tea for patients with fever is tantamount to adding fuel to the fire.
6. ulcer patients drink tea
The caffeine in tea can promote gastric acid secretion, increase gastric acid concentration, induce ulcers and even perforation.
7.drink tea during menstruation
Drinking tea during menstruation, especially strong tea, can induce or aggravate menstrual syndrome. Medical experts have found that compared with those who do not drink tea, the risk of menstrual tension is 2.4 times higher for those who have the habit of drinking tea. Those who drink more than 4 cups of tea a day have a three-fold increase.
8.stay the same
The four seasons of the year make the climate different, and the types of tea should be adjusted accordingly. It is recommended to drink scented tea in spring. Scented tea can disperse the cold pathogens that accumulate in the body during the winter and promote the growth of yang in the human body; in summer, green tea is suitable for drinking. Green tea has a bitter and cold nature. Skin sores, boils, infections, etc.; in autumn, green tea is recommended, which is neither cold nor hot, which can completely eliminate residual heat in the body, restore sweetness and warmth, and refresh people; drink black tea in winter, which is sweet and warm, rich in protein , Has a certain nourishing function.
Summary: Through this article, we know that drinking tea has many effects, such as improving muscle endurance, resisting ultraviolet rays, maintaining body shape, resisting radiation, improving memory, improving bone density, etc., but drinking tea is not suitable for everyone, such as people with constipation. People with neurasthenia, insomnia, calcium deficiency or broken bones, high blood pressure or heart disease are not suitable for drinking tea.
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Post time: Sep-26-2021