Caffeine is found in many foods that people consume: coffee beans and instant coffee (310-650 mg / l), tea (180-420 mg / l), cola about (100 mg / l), chocolate (20-100 mg / l ). In addition, caffeine is an integral part of various energy drinks, as well as some alcoholic beverages.
Despite the fact that caffeine is perceived differently by people, in the vast majority of cases, it affects the brain and nervous system, increasing performance. By antagonizing the neurotransmitter adenosine, which tells the brain that we're tired, caffeine reduces fatigue. In sports, there are even recommended doses of caffeine that, without harm to health, increase the performance of athletes by an average of 3% - this is 3-6 milligrams per kilogram of body weight (according to Matthew Gagno of the University of Arkansas).
One sixty-fourth of a teaspoon of caffeine makes you slightly more energized. One sixteenth of a teaspoon, which is contained in 350 milliliters of coffee, is a good dose for those who consume this drink regularly. A quarter teaspoon will cause discomfort, such as a fast heartbeat, sweating, anxiety, and even hallucinations. And half a tablespoon will most likely kill you (roughly equivalent to 6-8 liters of very strong coffee).
In healthy people who drink coffee in moderation (2-4 cups a day), no tendencies to the development of diseases (cardiovascular, oncological and others) have been revealed. No research has confirmed the association between moderate coffee consumption and different health conditions.
Abrupt cessation of coffee consumption by those who have done it regularly can lead to discomfort in the body: fatigue, drowsiness, headaches and irritation. But this addiction is more psychological and it is not so difficult to get rid of it.
Helps to increase attention and concentration, as well as the speed of a person’s reaction
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