Drinking coffee: The most consumed drink in the World. Good Or bad for heath?

Coffee, the most consumed drink in the world, is sometimes accused of all ills sometimes praised for its many virtues. But then, is coffee good for your health? Effects, mode of action, precautions, maximum quantity to drink ... We tell you everything.

Definition: what is caffeine?
Caffeine is the active ingredient in coffee, a substance with important physiological actions since it is responsible for the consequences of coffee on your body. It is quickly absorbed, assimilated and its effects are manifested very quickly in the brain. It is eliminated in a few hours in the urine. Note that the latter is not only present in coffee, it is also present in tea, cocoa, cola (nuts) and certain drugs.

Where does the coffee come from?
The coffee tree is a tropical shrub cultivated for its fruits called "cherries" containing pulp and green coffee beans. The roasting of these will develop the much sought after and characteristic smell of coffee. There are several varieties of coffee but two of them are particularly well known:

 -Arabica with subtle aromatic notes.
-Robusta, for enthusiasts of a more full-bodied taste and richer in caffeine.

Mode of action
Caffeine crosses the blood-brain barrier. Once present in the brain, it neutralizes the adenosine receptors which play an important role in the hormonal message. The resulting increase in nerve activity causes the release of adrenaline, which influences the heart rate.

Virtues and benefits of coffee
Coffee lovers know this well: consumed without noticeable excess, caffeine has the particularity of stimulating the nervous system, therefore plays a role in alertness, especially at night when a state of drowsiness is felt by allowing better visual perception and better reflexes.

Caffeine can alleviate a migraine thanks to its vasoconstrictor effect but in large quantities, the opposite effect can be observed. It leads to an improvement in digestive functions such as stimulation of gastric secretions, increases intestinal motility. As for its diuretic effect, it is no longer to be proven. In fact, 

caffeine increases urinary power. As for athletes, it decreases the perception of fatigue. In asthmatics, it would improve breathing. And good news, coffee would affect morning mood!

If coffee has undeniable health benefits, there are some caveats. Indeed, the consumption of coffee can cause:

-faster heart rate,
-palpitations in sensitive people.
-it can potentiate the effect of certain drugs such as aspirin or certain antihistamines. Vigilance is essential!
-Its association with risk factors such as alcohol or tobacco can have an impact on the occurrence of cancers.

Number of cups per day not to be exceeded
Even if this pleasure break has benefits, beyond 2 to 3 cups per day, its impact on your health can be harmful. But the effects of coffee vary significantly from one subject to another depending on its sensitivity and its ability to eliminate. Moderate your consumption in case of undesirable effects.

Coffee and pregnancy
Caffeine consumption in pregnant women should be moderate because the fetus takes a good week to eliminate the caffeine. Without forgetting all the effects that its consumption can cause in adults, imagine on the fetus!

Coffee and sleep
The effects of coffee on sleep are no longer to be demonstrated, but there are variations in individual responses to drinking coffee before sleeping. Sleep is later and of lower quality.

Precautions and contraindications
Coffee is contraindicated in people with:

heart problems,
gastric problems (gastritis, ulcer),

high blood pressure.

Dietitian's advice
Coffee has almost no calories unless you add sugar! It contains some far from uninteresting minerals such as potassium, vitamins PP and B9 but also polyphenols with antioxidant properties.

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