Today, caffeine is the most used drug in the world. Many people depend on it.
The most popular drinks in the world contain coffeine. Nowadays people commonly get coffeine through coffee, tea and Cola. Coffeine use is a socially acceptable addition.
In a plant, caffeine is a natural pesticide – it makes insects unable to move and then kills them. But in a person’s body caffeine acts very differently. It speeds up a person’s central nervous system, inside the body. It stimulates the brain – that is, it makes a brain act and react faster. Some people feel that they can be more creative when they drink caffeine. It makes people feel more awake. And it can also increase physical performance in sports.
Caffeine affects a person quickly. Imagine a person who is drinking a cup of coffee. The drug begins to affect him about five minutes after he starts drinking it. In 30 minutes, the caffeine affects the person most strongly. After about four and a half hours, his body has used about half the amount of caffeine. And by the next day, the caffeine is gone. Caffeine does not stay in the body.
Many people begin their day with caffeine in coffee or tea. Is it a good idea? Let's find it out!
In fact, people can come to depend on caffeine. It doesn’t take much to get hooked. As little as 100 milligrams of caffeine daily is enough to get an adult hooked. At this level of caffeine consumption, most people will experience some symptoms of caffeine withdrawal if they quit abruptly.
People who try to stop drinking caffeine may be very tired, have muscle pains, or even have stomach pain. But these symptoms usually stop in about a week. Too much caffeine can also cause problems. People who have had too much caffeine may have head pain or stomach pain. They may have a rapid heartbeat. They may feel anxious, worried or nervous. Too much caffeine can make a person unable to sleep. But there are also more serious effects when people take extremely high amounts. These effects include a feeling of not knowing where you are, body movements you cannot control, or even death.
By the way, the reason people who regularly drink caffeine wake up feeling groggy, confused or with a headache is that they are experiencing withdrawal symptoms from yesterday's coffee. These withdrawal symptoms are relieved when they get their morning fix of caffeine.
So how about positive effects of using coffeine?
Scientists claim that drinking coffee and tea with caffeine may reduce the risks of some kinds of cancer. It can reduce a person’s risk of getting type two diabetes. And even though it increases blood pressure and a person’s heart rate, it does not seem to cause problems with a person’s heart. But these good effects do not come from drinking caffeine in soft drinks – just drinks like coffee and tea.
It’s well known that caffeine awakens us and energizes the body, but also it can help in weight loss both directly and indirectly. Firstly, the direct effect of caffeine is an increased metabolic rate--with higher metabolic rate, the body burns more calories. Caffeine boosts in metabolic rate even in obese people, though the effect is more pronounced in non-obese people. Caffeine also boosts performance during exercise, indirectly causing more fat loss and weight loss. To understand how it works, watch this video.
So how much is too much? Do not take more than 400 milligrams of caffeine in a day! That is equal to about four to five cups of coffee. Many experts believe this amount is safe for an adult. Please, mind that people are different. It is impossible to say what a “safe” limit is for everyone. Ultimately, you have to be your own scientist. It is important for a person to know how much caffeine he is getting not only throught coffee and tea but other drinks and food.
the most used -самый употребляемый
drug - вещество, вызывающее привыкание
depend on - зависеть от
contain - содержать
pesticide - пестицид
unable - неспособный
speed up - ускорять
feel more awake - чувствовать себя бодрее
increase physical performance -повышать физическую работоспособность
affect - влиять
Let's find it out! - давайте выясним
come to depend (on something) - становиться зависимым от (чего-либо)
It doesn’t take much to get hooked - требуется немного, чтобы подсесть ( получить зависимость)
consumption - потребление
withdrawal - отказ от чего-либо
abruptly - резко, внезапно
muscle pain - боль в мышцах
stomach pain - боль в животе
head pain - головная боль
rapid heartbeat - учащенное сердцебиение
extremely high amounts - чрезвычайно большое количество
groggy - заторможенный, сонный
confused - растерянный, в замешательстве
claim - утверждать, заявлять
reduce - уменьшать, сокращать
cancer - рак
type two diabetes - диабет второго типа
increases blood pressure - повышает кровяное давление
heart rate - сердцебиение
awaken - пробудиться, пробуждать
weight loss - потеря веса
increased metabolic rate - повышенный уровень метаболизма
more pronounced - более выражен, больше заметен
boost performance - повышать производительность