Tea Drinking and Hypertension

Green tea is a healthy beverage, but it’s unsuitable for some people, such as those with hypertension (high blood pressure).

Green tea is known to contain many bioactive compounds, such as catechins. Catechins are considered to be responsible for many of the health benefits of green tea, which is supported by numerous evidence. For instance, research in mice has shown that green tea catechins inhibit gastric cancer development through suppressing the expression of interferon gamma (IFN-γ), a pro-inflammatory cytokine.

Of course, everything has its two sides. Epidemiological studies have shown that tea drinking is a factor that cannot be neglected to raise hypertension. The results showed that the mean value of systolic and diastolic pressure in tea drinkers was significantly higher than those who did not drink tea. The studies also excluded other factors that affect blood pressure, such as age, weight and alcohol consumption, and the tea-drinking factor still has a significant effect on hypertension.

Drinking tea raises hypertension, presumably because tea contains active substances such as caffeine, which increases heart rate and cardiac output, leading to a boost in blood pressure. US researchers have also reported that blood pressure in normal people increases greatly in a relatively short period of time after giving 150mg of caffeine. We often encounter this in daily life, and some people may suffer from dizziness after drinking tea.

Thus, drinking tea, like smoking, drinking and drinking coffee, is a cause of high blood pressure that cannot be ignored, especially for people who often drink tea.

It is reported that green tea, among various types of tea, has the least caffeine and more tea polyphenols (a group of compounds known to have an array of health benefits ). Therefore, for people with hypertension, it’s better to choose green tea.

There are six suggestions regarding tea drinking for hypertensive patients:

  1. Avoid drinking strong tea

Hypertensive patients should drink tea properly and avoid drinking strong tea, because the caffeine in strong tea excites the central nervous system, causes insomnia, increases the heart rate, increases the burden on the heart, is not conducive to rest, and is not good for hypertensive patients.

  1. Green tea and Oolong tea are better

People with hypertension are suitable for drinking green tea and oolong tea. There is evidence that if a person drinking 120 ml of green tea or oolong tea every day for more than 1 year, his chance of high blood pressure than those who do not drink tea will reduce more than 40%. If you have high blood pressure and still have doubts about whether you are suitable for drinking green tea, you can go to see your physician and have your blood pressure checked and begin monitoring it at home.

  1. Avoid drinking too much tea

A large amount of liquid into the blood vessels, it will aggravate the burden of the heart. Besides, tea contains the caffeine and theophylline stimulants, which will make the heart beat faster, leading to elevated blood pressure. The elderly, especially those with coronary heart disease and pulmonary heart disease, have poor heart function. For these people, drinking too much tea may produce chest tightness, palpitations and other discomfort symptoms.

  1. Avoid drinking tea before bed

Tea has a stimulatory, diuretic effect. Elderly people have different degrees of sleep disorders, so do not drink tea at night, lest it would trigger excitement, insomnia, and more urine, affecting the quality of sleep. It is not advisable to drink tea within 2 hours before going to bed. Choose plain water if thirsty.

  1. Avoid drinking tea when taking medicine

Before you undergo surgery or take medications, your doctor or hospital generally tells you to avoid drinking green tea. This is mainly because some compounds in green tea interact with medications. Some drugs can enhance the effects of the caffeine in green tea. In fact, tea can affect the activity of many drugs and supplements. Therefore, if you are taking a drug, confirm with your doctor whether you can drink tea or not.

  1. Avoid drinking overnight tea

As tea sits around for a long time, health components in it become weakened, taste gets worse, and oxidation and microbial reproduction increase. Overnight tea is considered harmful to your health, so don’t drink it.

In addition, drinking too much tea will dilute the gastric juice and reduce the concentration of gastric juice, resulting in indigestion, abdominal distension, abdominal pain and other symptoms. Overall, patients with hypertension should pay attention to these negative effects of drinking tea.