Tea, coffee and cocoa are called the three major drinks in the world. The first reason is that their output is the highest in the world. In addition, these three products do not contain alcohol, which means that there is no fermentation in the production process. Tea, coffee and cocoa are pure plants, which are beneficial to human health.
Among them, coffee, as the most popular drink in participating countries, is being liked by more and more people. Among people who like to drink coffee, most people will choose to drink coffee for a long time. Some people even regard coffee as the only drink besides water. What effect does drinking coffee for a long time have on human health? Two benefits are slowly emerging.
Coffee can refresh you. When studying this characteristic of coffee, scientists found that the reason why coffee can keep people awake is because caffeine in coffee plays a role. Simply put, coffee can help people relieve fatigue because it contains a lot of caffeine.
Caffeine is a substance that can excite human sympathetic nerves. Caffeine can effectively help people reduce the decline of thinking ability and prevent memory decline. A large number of scientific experiments have proved that caffeine has a good effect on relieving mental fatigue and promoting the activity of human cerebral cortex.
The scientific community calls coffee a xanthine alkaloid compound. This compound is also called central nervous system stimulant. As we all know, stimulant is an exciting drug. Caffeine is a pure natural stimulant. In medicine, caffeine is even used to treat nervous system diseases.
Coffee is the only source of caffeine. And the content of caffeine in coffee is very high. Scientific experimental data show that the caffeine content of Robusta coffee beans is as high as 2.2%. This means that every 100 Crobu Starr coffee bean contains 2.2 grams of caffeine.
Besides Robusta coffee beans, other coffee beans also contain a lot of caffeine. For example, the caffeine content of Arabica coffee beans is 1.2%. The caffeine content of coffee beans grown in Mocha, Yemen is 1.0 1%. The caffeine content of coffee beans produced in harald is 1. 13% and so on.
Because the caffeine content in coffee beans is huge, drinking coffee for a long time can improve people's thinking and memory. Scientific research shows that drinking a cup of espresso every day for more than a year will increase the standard of human memory curve decline by three percentage points. If you insist on drinking coffee all year round, you won't get Alzheimer's disease easily.
In addition to the above, coffee can help people refresh their minds, improve their memory, and help people's mood to be relieved and stable. In other words, coffee can adjust people's mood when they are in a bad mood state such as excessive anxiety and depression, so that people's mood becomes peaceful and quiet.
Alberto Ashlio, a professor of epidemiology and nutrition at Harvard University, once conducted an experiment to study whether coffee can prevent depression. The experimental researchers tracked and recorded 50,000 people who participated in the experimental research. According to the collected research data, coffee can effectively prevent and even help alleviate depression.
Among the experimental participants, those who insist on drinking three cups of non-espresso coffee every day have a lower risk of depression than those who don't drink coffee 15%. However, people who can insist on drinking four cups of coffee a day have a 20% lower risk of depression. Experimental data fully show that coffee can play a role in relieving emotions.
Although we can know from the above that drinking coffee for a long time is very beneficial to human health. But drinking too much coffee for a long time is also harmful to human beings.
Excessive drinking of coffee can easily lead to insomnia. Because the caffeine contained in coffee can make people feel excited, drinking too much coffee will make people fall into insomnia. Therefore, never drink coffee before going to bed. In the evening, you can't drink a lot of coffee if you want to stay awake.
Excessive drinking of coffee can cause palpitation, shortness of breath and arrhythmia. Excessive drinking of coffee will lead to a large amount of caffeine in coffee entering the human body. When the caffeine content in human body exceeds the normal range of human body, caffeine will continue to harm human heart and brain, resulting in a series of bad performances.
Excessive drinking of coffee will harm the kidneys. Excessive drinking of coffee will increase the number of times people go to the toilet. This is because the substances in coffee can stimulate adenosine receptors in human kidneys, thus playing a diuretic role. At the same time, caffeine can also reduce the secretion of antidiuretic hormone. Excessive urination is very harmful to people's kidneys.
Excessive drinking of coffee can also harm the human digestive system. Coffee contains a lot of caffeine, acid and oil, which will stimulate the gastric mucosa of human stomach. When gastric mucosa is stimulated, it will continuously secrete gastric acid, which can easily lead to some common stomach diseases. The stomach is an important organ of the digestive system and plays an important role in digestion.
In addition to the above-mentioned excessive drinking of coffee will have adverse effects on human health, there are also some special people who are not suitable for drinking coffee. In other words, this kind of people, who drink coffee for a long time, will not get the two benefits mentioned above, and may even endanger their health.
First of all, pregnant women are not suitable for drinking coffee. Because of the special physical condition of pregnant women, the metabolism of caffeine will become very slow. Drinking coffee for a long time is easy for pregnant women to miscarry. What's more, the children of pregnant women will also be adversely affected.
Secondly, patients with cancer and cardiovascular diseases are not suitable for drinking coffee. The fat contained in coffee will increase the fat content in the human body, which will make people who are already suffering from diseases worse.
In addition, postmenopausal women, children in the growth and development stage, people who lack vitamin B 1 and patients with digestive system diseases are not suitable for drinking coffee. In these cases, human beings must reduce or even not drink coffee.
Coffee is good for people. Drinking coffee for a long time can help people refresh themselves and relieve their emotions. Drinking coffee for a long time can also effectively help people prevent Alzheimer's disease and depression. But excessive drinking will be harmful to human health. Few people are suitable for drinking coffee for a long time.