Why Does Caffeine Wake Us Up?

by admin / May 29, 2015 / 0 comments

Sometimes it can be quite difficult to distinguish myth from the truth in the case of caffeine. It is so used by all of us, willingly or less, and is on the market for very long. Therefore, there is a risk that most of the information we have about it, learned from parents, grandparents or hardcore consumers, be slightly distorted. Therefore, we intend to analyze carefully the most common myths about caffeine and its effects on the body and to discover what is actually the truth. Does caffeine is able to induce a strong dependence, it has similar effects to drugs can alter the quality and quantity of sleep - are just some of the issues to be addressed.

Caffeine is actually a psychoactive substance, which is found in valuable plants: tea leaves, the beans, the cola in fruit guarana (used in the preparation of energy drinks) in cocoa beans, to name a few of the most common, with whom we come in contact every day. The amount of caffeine contained in these plants vary greatly from source to source. It seems that finally, caffeine can be quite important, depending on the amount of product that has a gross basis, by way of preparation and consumption.

The content of caffeine can be from about 160 mg to only some energy drinks or 4 mg in 25 ml of chocolate-flavored syrup. Caffeine in various coffees and it differs: Arabic version is weaker compared with its robust and a cup can contain 40 to 140 mg of caffeine. Even decaffeinated coffee is not completely free of caffeine. Experts have conducted numerous tests and have concluded that if consumed about 10 cups of decaffeinated coffee, the total dose of caffeine contained in them is similar to that of 2 cups of normal coffee.

So attention: decaffeinated coffee is not a practical solution for patients addicted to coffee but also having a hypertensive or cardiac pathology which requires giving up the drink.

Coffee may be contained in certain medications, especially painkillers usual, available in pharmacies in the state influenza drugs recommended in dietary supplements. Their actual content varies, of course, very much, but can range between 16- 200 mg of caffeine / product. There are merchants who have completed a wide range of shower and bath products based on caffeine, asserting that it is absorbed trans tegumentary.

But experts have not made this discovery and efficient products, only from this point of view, has not yet been demonstrated. The main effect, the order is so consumed caffeine and seems so appealing to us all is the central nervous system stimulation, reducing sleepiness and maintaining body for a variable period of time, on alert. We are able to concentrate better, to give a better yield, to stay longer Vigil.

For these reasons, caffeine is the most widely used psychostimulant. Currently, there are tablets containing pharmaceutical market and caffeine- they are used especially for students who are preparing for exams or people with activities that require the constant existence of a very high level of alert because it helps them to focus and ward off fatigue. It seems that over 90% of the adult population of the United States consumes daily, regular coffee or similar products containing caffeine. ( for more health tips visit http://health-tips.ca )

Tea leaves, for example, have a caffeine content even higher than the coffee itself, but in the end, its concentration in the finished product, they consume is lower because it is not as hard preparation. Besides the mode of preparation, the strength of the tea is low and growing conditions, extraction techniques and marketed product realization.

Article Contents


Myth 1: Coffee induces dependence

Myth 2: Caffeine can cause insomnia

Myth 3: Caffeine increases the risk of cancer, heart disease, and osteoporosis

Myth 4: Caffeine is harmful to pregnant women

Myth 5: Caffeine promotes dehydration

Myth 6: Caffeine is harmful to children

Myth 7: Caffeine awakens us from hangovers

Myth 8: Caffeine has no health benefits

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Myth 1: Coffee induces dependence

Unfortunately, this myth has some truth. A grain because it depends on what we mean by addiction. Caffeine is considered a psychoactive substance, but compared with other psychoactive substances, it is legal and widely commercialized and extremely popular. It has stimulant effects on the central nervous system and body's metabolism and is therefore used both medical and recreational purposes, personal.

It can be likened nicotine or alcohol as it is able to cross the blood-brain barrier and thus enter the brain, where it exerts its effects. It interacts with certain brain receptors and neurotransmitter substances and thus increases alertness, reduces fatigue and improves mental basal tone.

But if individuals consume increased amounts of caffeine over long periods, then the body adjusts intake. Following changes occur in two important effects: decreases responsiveness to caffeine (the effect is significantly reduced) and chronic consumption of unpleasant reactions occur (symptoms and signs that may be suggestive of caffeine addiction). Tolerance to caffeine occurs relatively quickly, especially if consumers increased amounts and those who prefer to combine coffee with energy Batur. Researchers discover that tolerance occurs if the subject consumes 400 mg of caffeine, three times / day for one week.

Although discusses addiction induced by chronic and excessive consumption of caffeine should be noted that this does not affect the individuum's life physically, economically, socially, as do other substances capable of inducing addiction. Reducing and even sudden standstill of caffeine can raise the neurotransmitters responsible for the unpleasant effects, especially adenosine. Symptoms appear one day after stopping caffeine and reach a peak within 48 hours, and then to reduce in intensity and disappear completely in 5-6 days.

The most common symptoms include:

- Headache throbbing, sometimes very intense, accompanied or not by nausea;

- Fatigue permanent;

- Anxiety;

- Irritability;

- Altered states of mental depression;

- Disorders of concentration, attention, drowsiness important.

Undoubtedly, quitting caffeine can affect us, sometimes serious, a few days, but the effects can not be compared with those of the withdrawal syndrome induced by drugs and narcotics substance. This is why the term addiction induced by caffeine is less used by specialists.


Myth 2: Caffeine can cause insomnia

The body absorbs caffeine very rapidly. Just as quickly, however, and it metabolizes and eliminates. This process is responsible liver. The half-life of caffeine is relatively low: on average, half the body remove ingested about 4-5 hours and 8-10 hours after, more than 75% of all the caffeine is already eliminated. Thus, most people who drink one or two cups of coffee in the morning will have no problems at bedtime because caffeine is eliminated by then.

But if coffee is consumed during the day, it is more concentrated or exceeds two cups, there may sleep disorders because the body can not eliminate quickly. However, most of us consume caffeine at least 6 hours before we sleep, precisely to avoid this unpleasant effect and to feel the advantage consumption during the day.

But individual sensitivity can alter how the liver metabolizes caffeine and so it may persist in some cases more in some individuals comparing to others. Sensitive individuals may have insomnia but also may suffer because of other symptoms, mainly gastrointestinal in nature: dyspeptic disorders, nausea, heartburn.

Consumed in high amounts over long periods of time, caffeine can cause in most people, what experts call caffeinism. This change is characterized by nervousness, irritability, tremor, anxiety, insomnia, headaches, heart palpitations and numerous digestive complications because caffeine increases the secretion of stomach acid. ( for more health tips visit http://health-tips.ca )


Myth 3: Caffeine increases the risk of cancer, heart disease and osteoporosis

It seems that certain amounts of caffeine, around 300 mg (equivalent to three cups of coffee) does not influence the state of young adults health, who have no other substantive issues. There are some patients who are most vulnerable. They are represented mainly by elderly patients diagnosed with heart disease and hypertension.

1. Caffeine and osteoporosis

Consumed in large amounts over 744 mg / day, caffeine is able to increase renal elimination of calcium and magnesium. Given that these substances are lost urinary decreases bone density and thus the patient is prone to osteoporosis and fractures. However, recent studies have shown that persons who consume electrolyte balance regularly caffeine is not significantly influenced by it.

The diuretic action of caffeine is the one that most likely gave birth to this myth. Input from specialists is that in the presence of a diet rich in calcium, people who consume moderate amounts of caffeine will not be affected in particular and will not develop osteoporosis solely due to the consumption of this substance. To remove the suspicion that we can develop as consequence osteoporosis consumption of caffeine can add two tablespoons of milk to each cup of coffee they consume.


To remember!

Experts have observed that there is a relationship between the incidence of hip fractures in older patients, especially in postmenopausal women (who do not receive preventive treatment appropriate antiosteoporotic) and caffeine. In the presence of risk factors, older adults are more susceptible to the effects of caffeine on calcium metabolism compared to healthy young adults.

Menopausal women are advised to consult a specialist and to ask for advice if you need to reduce their caffeine intake to less than 300 mg daily. This recommendation is useful for all patients with a history of phospho-calcium imbalances, and risk factors for bone disease occurrence (including prolonged treatment with corticosteroids).


2. Caffeine and cardiovascular disease

People sensitive to caffeine have a higher risk of developing the duration of consumption, a temporary increase in blood pressure and heart rate (tachycardia). There are some important studies that have demonstrated no link between caffeine consumption and hypercholesterolemia, arrhythmias and cardiovascular disease in general.

Moreover, some research even found one that ingested in moderate amounts, caffeine cardiac exert a protective role, but only in patients with mild hypertension. In patients diagnosed with cardiovascular disease or cerebrovascular disease, though experts recommend consulting a physician about any adjustment of consumption of coffee.

3. Caffeine and Cancer

For now, there is no evidence to support the link between caffeine and cancer, but it looks like it has some protective effect against some types of cancer.


Myth 4: Caffeine is harmful to pregnant women

Numerous studies have concluded that there is, at least until now, a link between the amount of caffeine (but no more than one cup of coffee per day) and the following:

- Disorders of conception;

- Miscarriages;

- Congenital malformations;

- Premature births;

- Low birth weight.

To remember!

Experts recommend limiting caffeine consumption to a maximum of 200 mg daily (the equivalent of two cups of coffee). It seems that a larger amount of conception can damage the product and may be associated with miscarriage. Still, can not determine the exact relationship between higher intakes of coffee and the risk of miscarriage because its etiology is so complicated, but it is better to prevent and reduce this risk factor.


Myth 5: Caffeine promotes dehydration

One of the effects of caffeine, when given in moderate amounts is stimulating diuresis. The patient urinates more and thus no risk of fluid imbalances. However, caffeine is consumed in beverages (tea, coffee, energy drinks) and so fluid intake is maintained in the normal range.

What specialists are trying to emphasize is that indeed moderate caffeine is a diuretic, but it consumed beverages can not be responsible for dehydration. There is always a balance between what is lost and what ingest, and thus is not installed hydro disorders.

It must be observed that, ultimately, caffeine is a diuretic so potent as feared initially.

Some experts even believe that water and caffeine have diuretic properties similar. In addition, caffeine consumers become less sensitive over time to the diuretic effect of caffeine.


Myth 6: Caffeine is harmful to children

A study in 2004 concluded that at the time, children aged 6 and 9 years consumed about 22 mg of caffeine daily. At present this amount is higher because energy drinks are more popular, and this trend seems to escalate.

It looks like a caffeine intake of 300 mg / day is not dangerous for children- not affect the somatic point of view. Experts wonder whether it is safe and recommended them and provide our children with such an amount. Children are very sensitive to caffeine and may develop psychological symptoms following contact with these psychostimulants.

Anxiety, restlessness, nervousness, irritability are all disorders that can expose children if we offer caffeine (in whatever form). In addition, caffeine with which children come into contact found in juices, energy drinks, cocoa, chocolate, which are rich in calories.

Thus, besides the risk of psychiatric disorders such products exposes consumption and obesity.

So even if in itself, does not cause organ damage and caffeine do not increase the risk of illness direct somatic children, experts do not recommend the inclusion in the diet of children products rich in caffeine.


Myth 7: Caffeine awakens us from hangovers

It seems that it is a true myth. I think people just wake up from a hangover better if they consume caffeine. Caffeine and alcohol should not be consumed together again. Caffeine does not cancel the effects of alcohol nor modify its metabolism. Reaction times and alertness are altered by alcohol and caffeine is not able to bring back normal parameters (or functional).

They were done studies that have shown that the risk of accidents is increased as if after alcohol is consumed coffee. Because the effects of alcohol to be removed, it must be removed from the body: to be rapidly absorbed, metabolized and then excreted. Caffeine can not influence any of these times, it can only raise the alert status of the body.

It will be more alert but his reflexes are as diminished psychomotor activity and coordination are equally corrupted. Caffeine is not recommended for patients with certain systemic diseases, heart disease or diabetes. Experts recommend extreme caution in patients with such conditions: they should not eat together or in sequence caffeine and alcohol because they potentiate its negative effects they have on the body and can induce the occurrence of cardiac rhythm disorders. ( for more health tips visit http://health-tips.ca )


Myth 8: Caffeine has no health benefits

Caffeine has certain health benefits, it is not as damaging as we are tempted to imagine. The known benefits of caffeine consumption include increased alertness, the improvement of concentration, ability to socialize with others and improving the body's energy status.

Other beneficial effects of caffeine include:

1. Improving the body's immune status due to an anti-inflammatory effect of caffeine.

2. Improvement symptoms induced allergic reactions due to their ability to reduce the concentration of histamine.

3. Reduce the risk of developing or worsening of diseases such as Parkinson's disease, colorectal cancer, type 2 diabetes, liver disease.

Despite the beneficial effects of caffeine, it should be noted that this has unpleasant reactions, especially if you consume large amounts over long periods of time. It can be an important cause of the occurrence of gastric ulcers, dyspeptic disorders, cardiac arrhythmias or mental disorders (hallucinations, psychosis, depression, mania).

It should be consumed in moderation for beneficial effects will be those that prevail. So we can really enjoy a delicious cup of coffee.