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Tea It is obtained tea of various kinds, such as tea black, green tea, which is made from the leaves of Chinese camellia plant , which has...

Tea

It is obtained tea of various kinds, such as tea black, green tea, which is made from the leaves of Chinese camellia plant , which has grown about 4,000 years ago in China, and different species in how to harvest their leaves, and the method of preparation; Black tea is distinguished by its dark color, strong flavor, and high caffeine content compared to other types, and is prepared by fermenting its leaves, unlike green tea.; Which is produced by heating its leaves with steam at a high temperature, which contributes to the preservation of the polyphenols that provide green tea with its many benefits compared to black tea, which has a lower content of polyphenols called catechin , and is eaten as desired cold, or Hot, and tea leaves and old stems can be used to make medicine. In addition, dried leaves and bud leaves are used to produce other types of tea

Damage to tea

Drinking tea in moderation among adults is considered safe, but you must be careful not to drink it sometimes, and adhere to the recommended daily amounts. Pregnant and breastfeeding women are not advised to drink more than 3 cups of black tea, or two cups of green tea, and it may cause the caffeine in Green or black tea has some side effects, including:

Increased risk of miscarriage and Sudden infant death syndrome. Intestinal irritation and increased intestinal motility in breastfed babies whose mothers consume tea.
Increased risk of birth defects in the fetus due to folic acid deficiency.
Feeling anxious .
An irregular heartbeat in some people, such as people with heart disease .
Increased risk of developing diarrhea, and it can also worsen symptoms of irritable bowel syndrome.
The possibility of high blood pressure for those who consume it for the first time and irregularly.
A higher risk of developing an overactive bladder.
Increased risk of osteoporosis , because of its effect on increasing the rate of excretion of calcium in the urine, and therefore it is advised to compensate for the loss of calcium and not to drink more than 2-3 cups of black tea, which contains about 300 mg of caffeine.
Headache and nervous tension .
Convulsion and confusion.
Tremor and vertigo.
Increased risk of developing glaucoma in the eye, as a result of increased intraocular pressure after taking it in half an hour to 90 minutes.
Avoid eating black tea for those who suffer from cancer - based hormones , such as ovarian cancer, breast cancer, what is believed to be black tea similar effect to the hormone estrogen.
An increased risk of anemia, because black and green tea contain caffeine and catechins, respectively, which reduces the body's ability to absorb iron from foods, and drinking a cup of black tea may reduce the absorption of nonheme iron by 70%, and therefore it is not recommended to drink black tea during meals that are high in non-heme iron content, especially among those suffering from anemia .
Reducing the effectiveness of some drugs as a result of their interaction with the antioxidants found in green tea, especially some heart medications, and blood pressure, and may reduce the effects of some drugs used to treat anxiety and depression.
The emergence of toxic effects as a result of consuming green tea supplements, which contain a higher concentration of catechins compared to consuming green tea itself.
Change in tooth color .

Benefits of tea

The effect of green tea varies from person to person, and it provides many health benefits to the human body, and among the benefits that can be obtained from consuming green and black tea:

Reducing the risk of oxidative stress, which leads to cancer by destroying the DNA of cells and converting them into cancer cells; Thanks to the fact that it contains catechins, which are a powerful antioxidant.
Reducing the risk of type 2 diabetes and heart disease.
Promote metabolism and increase fat burning , and its flavonoid content contributes to reducing low-density lipoprotein, or what is known as bad (LDL) cholesterol.
Support the body's immunity , reduce the risk of arthritis, Alzheimer's disease, Parkinson's disease, and improve brain function.
Reducing pain and swelling, and this can be done by using wet black tea bags on some types of bites.
Moist black tea bags also give relief to inflammatory eyes.

The nutritional value of the tea

One study found that 1 gram of green tea contains 11-20 milligrams of caffeine, and that each 240 milliliter cup of green tea contains about 22-40 milligrams of caffeine, while one cup of black tea contains 40-120 mg. Of caffeine, and one cup of 250 milliliters of unsweetened tea contains the following nutrients: