15:51 - 22.06.2018

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June 22, Fineko/abc.az. Do you need just one cup of espresso to wake up in the morning? Or maybe just one cup of coffee, drunk in the afternoon, prevents you to sleep at night?

Different answers to these questions depend on each person's sensitivity to caffeine.

Natural substance caffeine contains in various products, in particular, - in tea, coffee and cocoa.

A standard coffee cup contains approximately 75-100 mg of caffeine. After entering the body, caffeine is absorbed into the bloodstream through the stomach and intestines. As a result of blood circulation, it enters the brain, connects to adenosine receptors and increases the activity of nerve cells. Thus, there is a surge of vivacity and energy.

Caffeine is not delayed in the body, and is derived from it after splitting in the liver. It takes about four hours for caffeine to leave the body, although this may vary from person to person. Depending on the duration of caffeine, some may fall asleep peacefully despite a few cups of coffee taken during the day, while others try not to drink it after noon, so as not to disturb their sleep.

According to two main genetic factors, that is, speed of caffeine breakdown in the liver and its stimulating effect on the nervous system, coffee lovers are divided into three groups of sensitivity:

•      High sensitivity: low rate of cleavage in the liver and high ability of the compound in the nervous system. Even coffee in small doses has a strong stimulating effect, and an extra amount of drink can lead to sleep disorders.  This group includes a small number of people.

•      Medium sensitivity: there is a balance between the ability of caffeine to break down in the liver and connect in the central nervous system.  Such persons do not have any harmful effects on the body and sleep disorders, even if they drink 2-5 cups of coffee during the day. At night, it is recommended to take less caffeine, but again, it is individual.

•      Low sensitivity: caffeine is rapidly cleaved. Such persons can drink a lot of coffee during the day, night drinking also will not lead to sleep disturbance.

In general, experts do not recommend drinking coffee more than a day rate (400 mg) even for those persons whose body quickly breaks down caffeine.

Research continues on the effects of caffeine on the body

Some studies show that coffee, particularly caffeine, reduces the risk of many chronic diseases (cardiovascular disease, type 2 diabetes) and neurodegenerative disorders (such as Parkinson's disease).