What are the benefits and harms of tea?

What are the benefits and harms of tea?

The common tea drink is produced by steeping the leaves of the Camellia sinensis plant (scientific name: Camellia sinensis) in hot water. All types of tea are:

What are the benefits and harms of tea?

White, yellow, green, black, Chinese oolong or black dragon tea, and the tea called Puerh tea to this plant, which is produced using different methods and varies between fermentation time and processing method, and tea is the second most consumed beverage around the world after water. Directly, especially black tea, is the most consumed, then green tea, Chinese oolong tea or black dragon tea, and finally white tea.


tea benefits

Tea has many health benefits because it contains polyphenols compounds that enhance many biological activities in the body. Eye, red-eye.

The nutritional content of tea

Tea contains more than 2000 chemical compounds, the most important of which are; Phenolics such as flavonoids, and dyes, such as; Carotenoids, chlorophyll, and alkaloids, such as; Theophylline, theobromine, lignans, carbohydrates, fats, proteins, and amino acids, such as; A type of theanine known as L-theanine, and vitamins, such as; Vitamin C, Vitamin E, and Vitamin B2.

It also contains many nutritional minerals and traces elements, such as; The element fluoride available in tea leaves, which increases its concentration the elder it is, and all tea leaves are a natural source of caffeine unless it is removed during processing methods, but it differs among themselves in its concentration, as it is affected by the amount of water added to the tea during the brewing process, as well as the time of this The process, and whether the tea is packed in packaging bags or not.

Here are some details of the different types of tea:


General benefits of red tea

Red tea is made by drying tea leaves after being picked and then subjecting them to fermentation, which gives the tea a stronger flavor and a darker color. This tea contains the most caffeine. There are many benefits of red tea because it contains many important nutrients.

It also contains many antioxidants, such as; A compound called Epigallocatechin gallate, Thearubigins, Theanine, and Theaflavin;[7] which is the most prominent compound available in red tea, and it forms a group of polyphenols that are formed during exposure to oxidation processes, and it contains Ranging from 3 to 6% of the total polyphenols in tea.

These antioxidants and other compounds found in red tea can reduce inflammation in the body and the risk of chronic disease. Polyphenols also increase lipolysis and reduce fat accumulation by limiting the growth of fat cells.


General benefits of green tea

  • Green tea is made from the unoxidized leaves of the Camellia sinensis and is more mature compared to white tea leaves. These leaves may wither before being subjected to fumigation, then rolled and dried.
  • One of the benefits of green tea for rumen and diet is that it contains many antioxidants, the most abundant of which are catechins; It is superior to other types of tea by 30 to 42%, especially the epigallocatechin gallate compound. In fact, green tea is more beneficial in terms of its antioxidant content compared to red tea, and it also has properties that reduce inflammation and the risk of cancer.
  • It is also a source of vitamins, such as; Vitamin E, Vitamin C, and B vitamins, in addition to the most important types of dyes that give green tea a higher quality, such as; Chlorophyll, and carotenoids.
  • Is green tea harmful to pregnant women? Green tea can be used for pregnant women, because it contains a small amount of caffeine compared to red tea, as one cup, or the equivalent of approximately 227 milliliters, contains between 20 to 45 milligrams of caffeine, whose amount in tea depends on the duration of fermentation, and the amount of tea used in its preparation.


General benefits of white tea

  1. White tea became famous in the past decade, and it is considered the rarest type of tea, produced in small quantities, and is known to be expensive. It is made from closed buds of the tea plant and its immature leaves, and then these leaves are exposed to steam, thus inhibiting the activity of the polyphenol oxidase enzyme (in English: Polyphenol oxidase) in it, ends with drying, and these leaves retain a large number of catechins because they are less exposed to oxidation.
  2. Several studies have indicated the beneficial effect of this tea on biological processes that have been altered by oxidative stress, and that it may reduce the growth of bacteria, viruses, and fungi more than other teas.
  3. White tea contains caffeine in greater quantities than green tea, but it is present in greater quantities in new buds and leaves than in old leaves and buds. In contrast, white tea does not contain tannins or tannins as found in red tea.

General benefits of Chinese tea

Black tea differs from green tea and red tea in terms of oxidation; As green tea does not oxidize for a long time, unlike red tea, and black Chinese tea is partially oxidized, and Chinese black tea contains many vitamins, nutritional minerals, and antioxidants that are beneficial to the body, the most important of which are; Epigallocatechin gallate, theaflavin, tyarobagin, and theanine are responsible for the relaxation feeling caused by tea consumption. It also contains caffeine in an amount similar to that of green tea.


tea side effects

Disadvantages of drinking tea in large quantities

Here are some of the harms that may result from drinking too much tea:

Decreased iron absorption

Tea is one of the sources rich in tannins or tannins, which bind with iron in foods, which may reduce its absorption in the digestive system.

Increased feelings of anxiety, stress, and lack of sleep

Excessive consumption of caffeine in tea can cause feelings of stress and lack of sleep; As it reduces the production of the hormone melatonin, which causes lack of sleep, and if you notice these symptoms, you should reduce drinking tea, or consuming caffeine-free alternatives to tea.

Increased risk of heartburn

The relaxation of the muscle in the lower part of the esophagus increases due to the increased consumption of caffeine in tea. It also increases the production of acids in the stomach, and its reflux into the esophagus, which causes a feeling of heartburn.

Nausea, dizziness, and headache

Irritation in the tissues of the digestive system may occur in some people who suffer from allergies after consuming one to two cups of tea due to its content of tannins or tannins, and this causes the appearance of symptoms of nausea, and pain in the stomach, and the consumption of tea in large quantities and continuously causes headaches. Chronic, large amounts of it may also cause dizziness; But this side effect is rare, and occurs only if tea is consumed in an amount ranging from 6 to 12 cups, which is equivalent to 1.4 to 2.8 liters.

Disadvantages of drinking tea on an empty stomach

There are no studies showing the harms of drinking tea on an empty stomach, but taking green tea extracts concentrated on an empty stomach causes more harm than those caused by eating it after eating, according to a review published in the journal Drug Safety in 2008.

Disadvantages of drinking tea immediately after eating

Consuming tea with or immediately after food reduces the absorption of non-heme iron, but drinking it at least an hour after eating food does not reduce iron absorption by the same amount,[18] according to a small study whose results were published in The American Journal of Clinical Nutrition. 2017, and therefore the time of consumption of drinking tea is important to maintain iron levels, especially for those who suffer from iron deficiency.


Tea FAQ

What are the benefits of mint tea?

Many people used to add mint to tea, but there are no studies showing the benefits of adding it. However, mint and mint tea, in general, have many benefits, such as; Reducing cases of indigestion, spasms that occur in the large intestine, and reducing symptoms that follow surgical procedures, such as; Nausea, vomiting, headache, and other symptoms decrease.

What are the benefits of mint tea for men?

There is no information about the benefits of mint tea in particular for men, but tea, as we mentioned earlier, reduces the risk of prostate cancer in men, and many of the benefits are mentioned above.


Is tea good for children?

It has been shown that tea may reduce the risk of diarrhea in children aged two to 12 years, according to a study published in the journal Evidence-Based Complementary and Alternative Medicine in 2017, but more studies are still needed to prove these results, but its consumption On the other hand, in large quantities, it may cause aggravation of diarrhea in sufferers, especially red tea, due to its high caffeine content.

In general, the contents of the list of ingredients of any food or drink should be read before giving it to children, especially teas, because they contain caffeine, such as; Red tea, green tea.

The caffeine available in tea may increase their health problems, such as a poor diet that lacks nutrients and healthy foods, and weight gain; Unlike adults, who can eat calorie-free drinks without adding sugar, children prefer sweetened drinks that contain large amounts of sugar, and it was found that 90% of middle and high school students do not get enough sleep. They sleep less than 8 hours on average, according to a review published in Neuroscience & Biobehavioral Reviews in 2009.

In addition, tea contains oxalate and tannin compounds, which bind with iron, especially non-heme iron found in plant foods, such as peas, dark leafy greens, nuts, and beans, and reduce its absorption.

Is tea good for teeth?

There are no studies showing the benefits of tea for teeth, and on the contrary, it has been shown that continuous tea consumption is associated with an increase in the erosion of the dental enamel layer, according to what was indicated by one of the studies published in the Journal of Dentistry in 2001. 26] However, more studies are needed on this benefit.

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