Live or injure? What happens to people who drink coffee for a long time?

At eight o'clock in the morning, you have to get up before you wake up, in order to let yourself wake up quickly, drink the first cup of coffee; at one o'clock in the afternoon, busy work in the morning and the meal after lunch, in order to make yourself survive the afternoon, so drink the second cup of coffee…Sometimes work late at night, in order to make yourself boil again, so drink the third, fourth…cup of coffee.

Every time you drink your second cup of coffee, do you start to wonder if your body can bear it? How much coffee a day is too much? Caffeine addiction? (Then immediately take two more sips of coffee to calm your thoughts). There is also a situation where coffee is drunk, but it does not have a refreshing effect.

Why Does Caffeine Work? In the central nervous system of the brain, there is something called adenosine, which is one of the "initiators" of drowsiness. The more exercise and brain use, the more adenosine is produced. When this adenosine binds to receptors in the brain, people begin to feel sleepy. Caffeine acts as a neutral neurostimulant, acting as a third party, binding to receptors before adenosine, thereby reducing adenosine binding to receptors and reducing drowsiness.

However, the presence of caffeine can also alert adenosine. If you rely too much on caffeine every day to stay awake, adenosine will start to "protest"/habit! Every time caffeine arrives, there is a surge of adenosine receptor binding, so caffeine is useless even if it arrives immediately. This is also one of the reasons why many people drink coffee and do not achieve the refreshing effect.

Drinking coffee for a long time, can the body withstand it? Everyone's tolerance for coffee is different, and everyone drinks different types of coffee. Caffeine usually takes effect quickly, starting to have a refreshing effect 10 minutes after drinking coffee, and after 45 minutes, the caffeine concentration in the blood will reach its peak, so there will be more motivation to complete the work. But! Caffeine metabolism time will vary from person to person! For the average healthy person, the average half-life is 5 hours, and most people are between 1.5 and 9.5 hours.

So some people can start to feel sleepy after drinking coffee in the late evening, while others can count sheep after drinking coffee in the afternoon. At the same time, the type of coffee will also affect the effect of caffeine and have different degrees of impact on health, such as coffee containing milk and sugar, in most cases the caffeine concentration is low, and under the influence of sugar, coffee not only can not achieve the refreshing effect, but also can make you drink more sleepy, drink more fat. Long-term intake of coffee with milk and sugar will not only increase the risk of obesity, but also increase the risk of cardiovascular and cerebrovascular diseases.

A lot of research reports in the 1980s and 1990s often show that coffee is harmful to the body. In fact, more reasons are because instant coffee is popular in that era. Most of them contain sugar and plant fat. People who drink for a long time are also prone to obesity. Cardiovascular and cerebrovascular diseases affect health. Coffee means that it has been cued.

Nowadays, with the promotion of fine coffee culture, people have gradually begun to prefer pure hand-brewed coffee, and scientists have become more neutral in studying coffee and health. The subjects were mainly black coffee, and said that drinking a moderate amount of coffee every day can protect the heart and blood vessels, prevent dementia, etc., and prolong life (prolong life).

But! It should be noted that the above mentioned coffee that is beneficial to the body is black coffee without sugar and milk, and it is also a moderate amount of drinking. As mentioned earlier, everyone's tolerance for coffee is different.

According to FDA (Food and Drug Administration) safe intake standards, the average healthy person is not recommended to consume more than 400mg of caffeine per day. If it is American coffee, it is not recommended to exceed 5-6 cups per day; if it is hand-brewed coffee, it is not recommended to exceed 4-5 cups per day; if it is cold coffee, it is not recommended to exceed 2-3 cups per day.

Excessive intake of coffee is easy to produce caffeine addiction. Caffeine addiction is followed by an abstinence reaction, which refers to a specific psychological syndrome that occurs when caffeine intake is stopped or reduced. For example, there will be lethargy, depression, anxiety, nervousness, gastrointestinal/urinary/cardiac adverse reactions that affect life. In general, caffeine addiction occurs only in people who consume excessive amounts of caffeine over a long period of time.

Although domestic studies have reported that coffee with sugar is more likely to reduce the risk of death and prolong life than sugar-free coffee. But! That's assuming it contains just one teaspoon (6 grams) of white sugar, which on average contains far less sugar than drinks sold at popular coffee chains. Those who like to drink a variety of flavors of syrup coffee/0-carb coffee friends do not ecstasy…drink less sugar coffee! Drink less sugary coffee! Drink less sugary coffee!

Of course, the FDA's value of 400 mg can only be regarded as the ceiling. In the case of not piercing the ceiling, you also need to make adjustments according to your own situation. I really feel tired. What I have to do is pay more attention to my psychological/physical condition. I can't rely too much on coffee to refresh myself.

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