Green tea
Tea is brought in all kinds of tea leaves known scientifically as Camellia sinensis, a very common drink, as it is the second most drink drink in the world after the water, as it precedes coffee and soft drinks and other drinks are common and consuming, Three kinds of tea are the leaves of this plant, namely green tea, oolong tea, and black or red tea.
Green tea is prepared by drying and evaporation of fresh tea leaf leaves without oxidation of the polyphenols found in them. The heat inhibits oxidative enzyme activity in the tea. Oolong tea is prepared by partial fermentation of the tea leaves before drying. This is in contrast to black and red tea, which is fully fermented by drying tea leaves and evaporating. Green tea has the largest health benefits of these three species.
Green tea is produced in China and Japan, the most consumed tea in Asia, while black tea is the most consumed in Europe and America. Green tea has been in a healthy position since ancient times, and scientific interest began three decades ago. Studies have found a number of important health and therapeutic measures. It is considered a functional food, which gives health benefits beyond mere essential nutrients.
Benefits of drinking green tea on the
The health benefits of green tea are not limited to eating at a specific time of day, and there is no scientific evidence of a preference to take it at a particular time, but despite the benefits of many green tea, it affects the absorption of non-heme and calcium when it is The best times to drink green tea are those times away from meal times and eating, which include early morning hours before breakfast, and between meals, before or after two hours, and before bedtime after eating the last meal Period.
Benefits of Healthy Green Tea
Ancient benefits of green tea in ancient Chinese medicine are used to treat headaches, relieve body aches, digestive problems, depression and detoxification, as well as use as a tonic and as a prescription for prolonging life. In modern science, scientific research has found that green tea contains caffeine, theophylline, volatile oils and polyphenols, as these substances are responsible for its health benefits, and caffeine plays an important role in stimulating vigilance, improving the coherence of ideas and fighting fatigue.
While theophylline contributes to some caffeine roles, it increases mental activity, increases the strength of the heart muscle contraction and relaxes the blood vessels. It also plays a role in stimulating diuretics more than caffeine. It also contributes to the relaxation of the bronchial muscle and stimulates breathing.
Fight oxidation in the body
Green tea contains a high amount of antioxidants. It contains polyphenols, catechins, galic acid, carotenoids, tocopherols, ascorbic acid, and some minerals such as chromium, manganese, selenium, zinc, The green tea works to reduce the level of oxidative stress in the body, as it raises the level of oxidative resistance and slows the aging of cells.
Resistance to genetic changes and cancer
Studies have found that green tea reduces the toxicity of genes caused by cigarette smoking and has been found to increase the activity of enzymes that rid the body of carcinogens. Studies have also found a link between green tea consumption and prevention of many cancers, such as lung cancer, colon cancer, Esophageal cancer, oral cancer, stomach cancer, small intestine cancer, kidney cancer, pancreatic cancer, and lactoblastic carcinoma.
Several studies have also found that green tea helps prevent the formation of skin cancer, lung cancer, oral cancer, esophageal cancer, stomach cancer, liver cancer, kidney cancer, prostate cancer and other organs. Of cancer.
Regulate cell growth
Green tea also regulates the growth and death of normal cells, stimulates the growth of bacteria living in the digestive system. Catechins also fight the products of the active inflammatory process that increases the risk of cancer. Some studies of experimental animals found green tea to prevent The interaction between carcinogens in the body and genes helps protect genes from genetic changes that play a role in causing cancer. Some catechins in green tea inhibit the growth of cancer cells directly.
Fight breast cancer
Scientific research has found an important role for catechins in green tea in the fight against breast cancer, prostate cancer, and some studies have played a role in fighting colorectal cancer.
Reduce high blood pressure and cholesterol
Green tea has been used in ancient Chinese medicine for the purpose of lowering high blood pressure. Recently, the results of studies have differed in its effect on blood pressure. Some studies have found that green tea reduces high blood pressure because of the antioxidants it contains. Some studies have found the ability of green tea to lower blood pressure slightly.
In one study conducted in China, the average consumption of green tea (120 ml / day) per day for one year reduced the risk of high blood pressure, and long-term consumption was found to improve blood pressure in a study of older women, In contrast, other studies have not found a role for green tea in lowering blood pressure.
Prevention of heart disease
Many studies have found that taking green tea reduces the risk of atherosclerosis and coronary artery disease. The antioxidants in it are thought to protect LDL from oxidation, and ketetinic compounds help lower blood cholesterol levels and reduce It can also contribute to the relaxation of blood vessel walls. All of these compounds work together to reduce the risk of cardiovascular disease.
Improve oral health
Many studies have found that eating non-sugar-based green tea reduces the risk of tooth decay and also reduces the chance of tooth decay even when there is sugar in the diet.
Some studies have found that catechins found in green tea reduce the risk of gum disease. These compounds have been shown to inhibit the action of amylase in saliva, which is used to digest starches, reducing the chance of tooth decay. Which reduces the chance of caries, tooth decay and oral cancer, as well as the role of antioxidants found in green tea in the prevention of oral cancer and caries.
Protect the skin from ultraviolet rays
Continuous UV exposure raises the risk of many skin diseases, such as skin cancer, and studies in experimental animals have found that the external use of polyphenols in green tea or tea reduces the risk of skin cancer caused by exposure to these rays .
Fight obesity and lose weight
The study of global studies differed on the effect of green tea on body weight. Some studies found that eating green tea increases the rate of calorie burning and contributes to weight loss. A study of rats found a role for both caffeine and thiamine in improving the effects of polyphenols on Body weight, and found that eating green tea can reduce the digestion rate and absorption of fat, in addition to the effect of caffeine and polyphenols in raising the hormone norepinephrine, which works to raise the level of energy that the body burns.
A study found that eating green tea leaves, oolong tea and black tea for test rats reduced body weight, triglycerides, total cholesterol and LDL cholesterol. In contrast, some human studies did not find the effect of green tea on weight, A study of the inverse relationship between green tea intake and body weight in people who have been taking green tea regularly for 10 years or more has shown.
Improve glucose tolerance and insulin effectiveness
Several studies have found a role for green tea in improving glucose tolerance and improving insulin activity and activity. In one study, rats found that green tea lowers glucose, insulin, triglycerides, free fatty acids in the blood, Polyphenols have also been found to raise the rate of glucose intake to fat cells. Some studies have shown that taking green tea may help restore insulin-producing beta cells in the pancreas.
Phenolic compounds extracted from green tea contribute to lowering the level of liver and kidney enzymes that are high in diabetes, as found in animal studies. They also reduce lipid oxidation, which also increases in diabetes. Experimental animals performed a role for catechins in triglycerides in diabetes. In addition, these compounds were found to perform insulin-like activities and improve insulin function.
Other benefits of green tea
The benefits of other green tea include:
- Green tea is a source of water, and it helps to increase the amount of water taken daily, and is a good source of many vitamins and minerals.
- Resistant bacteria and viruses, which include the Helicobacter pylori, which causes the ulcer, while it does not affect the beneficial bacteria living in the digestive system, and green tea has been found to play a role in the fight against the influenza virus, especially in the early stages, and Herpes simplex virus (Herpes) simplex), and adenovirus, which causes adenocarcinoma.
- Resistance of some fungi.
- Improve bone density and reduce the risk of fractures, which include pelvic fractures.
- Prevention of liver, skin and arterial lesions.
- Support the work of the immune system.
- It is suggested that the addition of green tea to prescription drugs helps prevent kidney rejection of kidneys after kidney transplantation.
- It is suggested that green tea contributes to the prevention of Parkinson’s disease, Alzheimer’s disease and other neurological diseases.
- Green tea is useful for insect stings because of its resistance to inflammation and its role in stopping bleeding.
- Some studies found an inverse relationship between green tea intake and kidney stones.
- In animal studies, green tea has been shown to reduce cataracts in cataract (white water or cataract).
- Green tea can be useful in cases of alcohol poisoning.