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Caffeine: its action on our body

Published : 2018-12-23 10:55:07
Categories : Councils to sleep well Rss feed

Caffeine is the psychoactive substance that comes first in terms of consumption on a daily basis in the world. Many of us start our day with a cup of delicious hot coffee or to accompany our breakfast. But how well do you know the effects of caffeine on your body? This is what we intend to reveal in this section.

The stimulating action of coffee

Like coffee, a large number of products contain caffeine such as tea, cola, chocolate, energy drinks ... And like all psychotropic substances, this natural substance has the flavor slightly bitter affects the neurotransmitters of the central nervous system. That's why when you consume caffeinated products, your energy level and alertness increases even if you suffer from a lack of sleep. Caffeine, stimulating action, keeps you alert and activates your production of adrenaline and dopamine.

A substance rapidly metabolized by the body

It is no coincidence that the morning routine of a large number of people includes the consumption of one or more cups of coffee. When you get out of bed, when the urge to absorb a product that can keep you awake is urgent, coffee is just right because it only takes a few minutes to access the brain and stimulate the nervous system. Ten minutes after tasting, alertness increases and cognitive functions improve. After an hour, the presence of caffeine in our body is at its highest level, before being partially evacuated in more or less four hours. The other part remains in the blood about fifteen hours more.


Is coffee good for health?         

Caffeine and its health benefits

In addition to its beneficial effect on cognitive functions, the benefits of taking caffeine to combat certain diseases related to physical health, such as Alzheimer's and Parkinson's, have long been recognized. At moderate doses, caffeine helps to prevent or at least relieve some other pathologies including kidney, intestinal transit, cardiovascular and pulmonary systems, headache.

By cons, consumed to excess, caffeine can cause, among other effects, the acceleration of heart rate, anxiety and impatience. Sudden arrest can lead to withdrawal symptoms, such as headaches and some irascibility. Caffeine also greatly influences the quality and duration of sleep.

Caffeine and the quality of nights

While it is difficult to know exactly how much coffee disturbs the ability to sleep peacefully since it differs considerably from one person to another (this will be discussed in the next section), the consumption of caffeinated beverages less than 60 minutes before bedtime blocks signs of fatigue and prolongs the duration of sleep. And individuals who are particularly sensitive to caffeine should avoid eating four to six hours before going to bed. In terms of sleep quality as such, studies have shown that caffeine increases the duration of stage 2 (slow light) and reduces stage 3 and 4 (deep). It also increases the risk of frequent night awakenings. This is why an excessive intake of coffee the day before and the absence of a curfew for caffeine make you wake up the next day with a painful feeling of fatigue that can follow you all day and affect your well being.

It's good to remember that caffeine has a shelf life of between five and eight hours. Throughout this period, half of the substance consumed remains in the body. Five to eight hours later, half of that amount is still in the blood and so on.

Its assimilation differs from person to person

Sex, tobacco and alcohol use, ethnicity, oral contraceptive use are some of the factors that influence how caffeine is metabolized. Also, in women and smokers, caffeine is more rapidly assimilated compared to men, non-smokers, women taking oral contraceptives and people of Asian origin who, in turn, will keep the molecule in their blood Longer.

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