Drinking tea, green tea, black tea, oolong tea, prevention of cancer, dementia four major benefits

Whether it's green tea, oolong tea or black tea, it contains nutrients such as catechin and glutamic acid that are healthy and anti-aging, and the vitamin C content of green tea is four times that of lemon! How much do you need to drink a day to prevent dementia and reduce the risk of cancer?

The Japanese monk Rongxi of the Takeura era (editor's note: the founder of Linji Zong in Japan, the author of the Book of keeping Health of Tea, which is revered as the ancestor of Japanese Tea) once said, "Tea is an elixir of health and a wonderful skill of prolonging one's age."

There are many kinds of tea, but all of them are made from the leaves of the "tea tree" of the family Theaceae. After natural fermentation, green tea will turn brown and become oolong tea and black tea.

The astringent ingredient "catechin" in green tea has anti-cancer effect; the bitter ingredient "caffeine" can be refreshing; the fresh flavor ingredient "glutamic acid" will turn into "GABA" in the body, lowering blood pressure; and the content of vitamin C is four times that of lemon, which has a strong antioxidant effect, which shows that tea is a very healthy food.

2 to 5 cups of green tea a day to prevent dementia and cerebral infarction

Catechin, which has a strong antioxidant effect, can prevent the body from aging. Catechins in green tea can prevent oxidation and inflammation, as well as cancer, dementia, cerebral infarction, hypertension, diabetes, obesity, allergies, food poisoning and so on. Nearly 15% of the dry tea weight of green tea is catechin.

According to the report, people who drank more than two cups of green tea a day reduced their risk of dementia by 46 per cent, almost halving; in terms of mortality from cerebral infarction, men who drank more than five cups of green tea a day decreased by 42 per cent and women by 62 per cent.

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Here's how catechins prevent dementia and cerebral infarction. The energy activity of the brain is quite active, accounting for 20% of the total oxygen consumption, that is, the brain is in the most oxidizing environment.

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The brain has a tight defense system to prevent the invasion of foreign bodies, that is, the "blood-brain barrier" (cerebrovascular barrier), so catechins can pass through this defense system even though important antioxidants are not easy to pass through.

The blood-brain barrier will narrow the gap of cerebral vessels, avoid the invasion of foreign bodies, and only allow the nutrients needed by the brain to pass through this blood-brain barrier, mainly fat-soluble nutrients (soluble in oil but not soluble in water). Unfortunately, the antioxidant vitamin C is water-soluble (soluble in water, not soluble in oil), so it cannot be passed.

However, both fat-soluble vitamin E and both fat-soluble and water-soluble catechins can pass through the blood-brain barrier, inhibit the oxidation of brain nerve cells and around cells, prevent the formation of AGE (advanced glycation end products), reduce the accumulation of amyloid-β (old waste material), and prevent dementia.

Moreover, catechin can also play an antioxidant role in cerebral vascular arteries, control cerebral vascular arteriosclerosis and avoid cerebral infarction and intracranial hemorrhage. (recommended reading: low caffeine, anti-aging, activate the brain, try green tea instead of coffee.)

Five cups of green tea a day reduced the risk of prostate cancer by 50%.

Catechins in green tea also have anticancer effects.

In Shizuoka prefecture, Shizuoka prefecture, where tea is grown in japan, the death rate from stomach cancer is 20% lower for men and 30% lower for women. Men who drank more than five cups of green tea a day had a 48% lower risk of progressive prostate cancer.

As long as you drink more than 5 cups of green tea a day, the risk of prostate cancer, dementia and cerebral infarction can be reduced by 50%. The results of this study should be greatly promoted.

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Green tea can reduce the risk of cancer, heart disease and cerebrovascular disease of the three leading causes of death in Japan by 50% each. Moreover, as long as you drink 2 cups of green tea after each meal, you will drink more than 5 cups a day, and it is very easy to get into the habit.

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This is not the only effect of green tea, it also has antibacterial effect. Put 10, 000 Omur157 Escherichia coli in 1ml green tea, and all the bacteria will die after 5 hours.

We all eat "raw food" in sushi restaurants, and "green tea" has the effect of preventing food poisoning, so this collocation is reasonable. In addition, green tea can also prevent tooth decay and bad breath, and the habit of drinking green tea after meals has a lot of benefits.

However, it is recommended not to drink cold tea, hot tea is the best. After all, healthy elderly almost do not drink cold drinks, cold food will cool the body, which is not good for health. If the body temperature drops, it will not be able to emit heat to fight against foreign enemies.

Oolong tea can promote fat excretion and lose weight.

Oolong tea and black tea are both brown, so it may be appropriate to put them in a brown chapter, but they are both green "green tea" relatives, so it's better to move on here.

During the fermentation of semi-fermented oolong tea, catechins combine with each other and form polyphenols of oolong tea.

(photo Source / Unspalsh)

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According to the report of animal experiments in mice, mice that ate high-fat foods improved the symptoms of obesity and fatty liver after drinking oolong tea for 10 consecutive weeks, and their fat excretion increased by 30%. It can be seen that polyphenols of oolong tea can absorb fat and excrete from the body, so greasy food and oolong tea will be the best partners.

Two cups of black tea a day reduced the risk of ovarian cancer by 30%.

Black tea, like green tea, has the effect of preventing cancer. As long as you drink more than two cups of black tea a day, the risk of ovarian cancer is 32% lower than that of people who drink less than one cup.

The catechins in black tea have no color, but in the process of fermentation, two catechin molecules combine into one and become "theaflavins", showing orange color. Theaflavins have the effect of reducing weight by inhibiting intestinal absorption of fat, as well as antiviral effect.

By the way, if you want to prevent influenza virus, you can dilute a cup of black tea to 5 times as much as 10 times and make mouthwash (Department of Pharmacy, University of Japan).

Both black and green teas contain less caffeine than coffee, so they can also produce just the right pick-me-up effect. The caffeine content of green and black tea is only 1/3 of that of coffee.