Every day, new and often contradictory information emerges about the effects of coffee on the human body. It is widely believed that by oxygenating the brain, it improves our concentration. But do we really need caffeine to work effectively? And do we know how to drink it to get results?
As many as 75% of Poles say they drink coffee. Half start their working day with it. And although annual consumption in Poland (2.5 kg per person) is far below the European average (6 kg per person), many people unknowingly harm themselves by abusing coffee. The daily recommended dose of caffeine is 300 mg. Its effects are felt about half an hour after drinking coffee.
Popular with white-collar workers
Reports compiled for last year's World Coffee Day show that 55% of workers drink coffee while at work. 43% say that without a morning dose of caffeine, their productivity decreases. The occupational groups most likely to drink coffee at work include food and beverage workers, scientists, sales representatives, writers, media professionals, marketers, PR professionals and business consultants. These professions are also the ones who often take too much caffeine. Contrary to popular belief, espresso contains the least amount of caffeine ( 57 mg) of all coffee preparation methods. This is because the extraction time of freshly ground coffee is very short - around 20 -25 seconds, and coffee prepared in this way is the most essentious, hence the misconception about its strength and caffeine content. By comparison, there is about 95 mg in a cup of instant coffee and as much as 120 mg of caffeine in a glass of brewed black coffee.
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Themaximum concentration of caffeine in the blood lasts for about an hour, while it can act for another four," explains expert Joanna Sobyra, "Exceeding the recommended daily dose has negative effects on the body - the so-called 'caffeine nervousness', i.e. nervousness, anxiety, irritability.
It is worth remembering that it is not only by drinking coffee that we ingest caffeine. Its average content in a glass of green tea is 35-75 mg, in the case of the black variety it is even 90 mg. Popular energy drinks, which we reach for in order to stimulate ourselves, contain about 32 mg of caffeine per 100 ml. However, it is worth remembering that 1 000 mg is already a poisonous dose for our body.
