Green tea harms


  • 1 green tea
  • 2 harms of green tea
    • 2.1 Reasons for the harmful effects of green tea
    • 2.2 Green tea harms and toxic symptoms
    • 2.3 Warning against drinking green tea
  • 3 benefits of green tea
  • 4 References
  • 5 video harms of drinking green tea

Green tea

Sometimes tends to drink green tea to break the daily routine of drinking black or red tea, and because of the often heard and read about green tea and its health benefits, as it is easy to prepare and taste good, what is the difference between green tea and others, and does it harm?

There are three types of tea that are prepared from the leaves of the Camellia sinesis, which are green tea, oolong tea, and red and black tea. The difference between these three types is according to the degree of oxidation and fermentation, where green tea is prepared by evaporating its leaves and drying them just before Packaged until the action of the enzyme that causes oxidation is inhibited, while the oolong tea is partially oxidized and fermented, and red tea leaves are exposed to fermentation or complete oxidation, so green tea leaves retain all the antioxidant compounds, and retain the highest degree of health benefit For humans, [1] it is therefore preferred to drink black tea.

Green tea that is eaten around the world is mainly produced in China and Japan, [1] and there are several types of it that vary according to the place where it was grown, some minor differences in the way it is harvested, and the difference in the weather condition of the area in which it was grown, in addition to Some other factors. [2]

The harms of green tea

The causes of the harmful effects of eating green tea a lot

The harms caused by eating large quantities of green tea are due to three components:
  • Caffeine: Although the content of green tea caffeine is not a high level of tea red or black or coffee, but eating very large amounts of it raises the amount of caffeine intake to a degree may be toxic. [1] , [3]
  • Aluminum: Studies have found that the accumulation of aluminum in the body has toxic and damage, and causes many neurological diseases, as it was found that the tea plant contains this mineral component, and the frequent consumption of aluminum can cause an accumulation of aluminum in the body, especially in the event of kidney problems. [1] , [3]
  • Polyphenol compounds that bind to minerals such as iron and calcium. [1] , [4]

Green tea harms and toxic symptoms

Green tea is generally considered a safe food for adults if it is consumed in moderate quantities that are considered natural in a person’s diet, except that consuming it or taking its extracts in large quantities can be unsafe, and it can also cause side effects ranging from simple to severe and dangerous according to the amount of consumption , where these effects include headaches, insomnia, diarrhea, and cardiac arrhythmia , heartburn, dizziness, tinnitus, convulsions, tension , Flicker, and cluttered mind, you get these toxic when eating five or more cups of green tea a day, [5] as It works Green tea also reduces the absorption of non-heme iron from food, [4] and can cause stomach upset , as well as constipation in some people. [5]

The negative effects of eating large quantities of green tea include damage to the liver cells, as the main type of green tea cats is toxic to liver cells in large quantities, and given that the liver is a key member in the metabolism processes in the body, the effect on it affects many other functions of the body . In a study on experimental animals, it was found that eating large quantities of green tea works to oxidize the liver and pancreas cells and consequently damage them and influence their work. [3]

Among the cells of the pancreas that get oxidized due to the large quantities of green tea, beta cells responsible for the production of the hormone insulin , and therefore it was found that eating large quantities of green tea leaves bad results in cases of diabetes in experimental animals. [3]

In addition to the effect of green tea on non-heme iron, it reduces the absorption of calcium in the body, as the catechins present in it have the ability to bind to these two minerals and reduce the body's ability to benefit from them, [4] and therefore it should be avoided during meals, and quantities should be reduced Tea for people suffering from anemia , or who need calcium in the treatment of a specific condition. [5]

Eating very large doses of green tea or its extracts can lead to significant toxicity that may cause death. [5] In addition, it was found that consuming large quantities of green tea causes an enlarged thyroid gland in animals with healthy trials of diseases. [3]

Warning to drink green tea

  • Anemia: Green tea can worsen anemia , especially if it is eaten at mealtimes, but this effect can be avoided if it is consumed in moderation, and lemon is added to it, and the spacing between eating it and meals. [1]
  • Severe cardiovascular disease, and any problems in the heart muscle. [3]
  • Pregnancy and breastfeeding: Not eating more than one cup to two cups, [3] where there was a relationship between eating more than two cups per day with the risk of miscarriage and other negative effects, and the caffeine in green tea goes to the infant through breast milk and causes a negative effect. [5]
  • Anxiety disorders: The caffeine in green tea can make the condition worse. [5]
  • Bleeding disorders: Caffeine can increase bleeding, so drinking green tea should be avoided for those who suffer from bleeding. [5]
  • Diabetics: Caffeine can affect blood sugar , so you should carefully monitor your blood sugar level if you suffer from diabetes when eating green tea. [5]
  • Liver disease: Green tea extracts can worsen the condition of liver patients. [5]
  • High blood pressure: Caffeine can increase high blood pressure in people with high blood pressure, especially when consumed frequently.
  • Osteoporosis: Eating green tea can lead to an increase in the amounts of calcium excreted in the urine. Green tea should be limited to no more than two to three cups per day, and calcium excreted in the urine can be replaced by consuming calcium supplements. [5]
  • Irritable bowel: Caffeine in green tea, especially when consumed in large quantities, can make irritable bowel symptoms and diarrhea worse. [5]
  • Taking medications: Green tea increases the diuresis, which affects the levels of some medications in the blood. Therefore, care must be taken when consuming green tea in cases of taking medications, and ensure that it does not negatively affect its work. [3]
  • Glaucoma (blue water): Drinking tea raises pressure inside the eye . [5]

Benefits of green tea

Green tea is considered one of the most beneficial drinks for health, as it is considered a functional food, that is, it has many health benefits that exceed just the nutrients it contains due to the compounds of catechins, [1] and the following are some of its benefits in short: [1] , [ 3]
  • Resistance to oxidation and oxidative damage in the body and related diseases.
  • Green tea has been used in Chinese medicine since ancient times to treat headaches, body aches, problems with digestion, depression and the removal of toxins from the body.
  • Resistant to many types of cancer, such as: oral cancer, skin cancer, lung cancer, stomach cancer, esophageal cancer, liver cancer, kidney cancer, small intestine cancer, colon cancer, rectal cancer , breast cancer, uterine cancer, and prostate cancer.
  • Reducing blood lipids.
  • Reducing the risk of cardiovascular disease .
  • Improve oral health, prevent tooth decay and fall, and periodontal disease.
  • Raising the level of calories burned in the body, which contributes to weight loss , and this effect is considered small for those who wish to treat obesity and excess weight, and it should be used as a support only for the basic treatment of diet and exercise.
  • Improve glucose intolerance, and improve insulin action.
  • Resistant to many viruses, bacteria and fungi.