Caffeine in capsules: see options and effects of the supplement

Just go to a pharmacy to find them easily: caffeine capsules are a more versatile option for energy drinks or even coffee.

Anyone who needs an extra dose of energy – whether to study or keep sleep awake – finds a high concentration of the substance in 1 or 2 capsules.

Know more about it, how to take it and how it acts on the body!

What is caffeine?

Caffeine is a substance called psychotropic that stimulates the central nervous system. It is present in some foods, such as coffee, soft drinks and teas, but it can also be found in supplement form, in higher concentrations.

Chemically known as 1,3,7-trimethylxanthine, it is one of the most consumed substances in this category worldwide.

In general, in the body, caffeine acts as a stimulant, affecting blood circulation, heart and increasing the release of adrenaline.

Thus, it promotes alertness – so it is widely used for those who want to chase off sleep and reduce tiredness . It can also help in contraction and focus, but as long as it is used in adequate amounts, as in excess it can lead to states similar to those of anxiety .

In addition, caffeine has diuretic and thermogenic effects, that is, it increases the elimination of urine and speeds up the heartbeat.

Despite being naturally present in some foods, excessive consumption involves risks, as this substance also promotes tachycardia and bronchodilation.

Although they are desired effects by some people (especially those who are looking for weight loss), it is necessary to pay attention to this, as it can generate states of anxiety, malaise, insomnia , irritability and exaggerated arousal.

Frequent consumption also leads the body to become accustomed to the doses, so that those who use caffeine to maintain their focus or frighten their sleep tend to consume increasing doses to obtain the same effects.

And, if the person goes into a state of dependence on the substance, the interruption of consumption can cause headaches, irritation and feeling tired.

What is caffeine capsules for?

Capsule caffeine can help those who need more energy at work or physical activity

Caffeine capsules are supplements that serve to increase focus, energy or stamina. In general, they are used by those who need to study or work, but also by those who want to keep pace during sports practice.

It is also common for those who wish to lose weight to use the supplement, due to the diuretic and thermogenic effects – but it is noteworthy that the use of any supplement necessary for medical monitoring and, even so, there is no scientific consensus on the real effects of caffeine consumption. for fat reduction purposes.

Anyway, among the possible uses of caffeine capsules are:

  • Increase focus and concentration;
  • Give more disposition and energy;
  • Remove sleep;
  • Increase metabolism and heart rate;
  • Assist in fat reduction;
  • Give more resistance during sports practice.

What are the effects of caffeine in capsules?

When ingested, the caffeine capsule is quickly absorbed by the body – and the rate of use is quite high, reaching about 100% bioavailability. Between 15 and 120 minutes, the substance reaches its peak in the bloodstream.

It is metabolized in the liver, being converted into paraxanthin, theophylline and theobromine – biologically active metabolites. In addition to the liver, other tissues, such as the brain itself, are part of the metabolism of caffeine as well.

And of all the product processed by the body, a small part, around up to 3%, is excreted in the urine – that is, it is possible to detect caffeine without changing its chemical constitution with a simple analysis of the urine. But it takes some time. It may take more than 30 hours for the body to eliminate all caffeine.

Effects on the brain

Caffeine has a presentation very similar to another molecule present in the brain: adenosine. This is related to the feeling of physical tiredness. That is, when the body needs to rest, adenosine is released, giving signals to the brain that it is time to slow down.

However, when caffeine arrives, it binds to the receptors that should be occupied by adenosine. That is, signs of tiredness stop being received.

The substance also leads to the production of norepinephrine (or norepinephrine) and serotonin , which are related to the control of mood and well-being. That is, that feeling of happiness and pleasure comes from acting caffeine.

Effects on the heart

Caffeine also affects some body functions, such as heart rate and blood pressure. This is due to the release of adrenaline and norepinephrine, which make the heart beat faster (tachycardia) and blood circulate faster.

However, in moderate doses, these effects are small for most people – it is worth remembering that each one has a different sensitivity. Thus, a cup may have no effects for some, but it can cause tachycardia for others.

How to use?

Caffeine capsules should be taken with water at any time of the day. It is necessary to pay attention to the dosage, as each brand or product may have different concentrations of the substance.

In general, the maximum dosage should not exceed 400mg per day, but that includes considering all other foods that contain caffeine. That is, if you are going to consume the capsules, it is worth moderating in coffee, green tea, chocolate and energy drinks.

The supplement should not be used by children, pregnant or lactating women. Care should also be taken when using a history of substance sensitivity or heart problems.

Another important point is to keep an eye on the combinations, such as bronchodilator medications or any other type of medicine.

Can it be used to lose weight?

Caffeine capsules can help with weight reduction

There are many people who bet on caffeine as a supplement to help with weight reduction. In part, the ergogenic effect is defended by some studies, but there is still a lack of proof.

As it also helps to reduce the perception of tiredness, physical activities can be supported for a longer time, causing more calories to be spent due to more disposition.

These effects, together, can be effective for those who want to lose weight, as long as they are combined with a good diet and, of course, the practice of physical activities. This is because the consumption of caffeine alone does not promote a sufficient metabolic increase to cause weight loss.

Caffeine in capsule is bad?

Caffeine itself is not bad for your health, as long as it is consumed in moderation. Some people are sensitive to the substance, so that no amount should be ingested, but in general it is possible to use it (in coffee or even in supplement, when necessary), as long as within the indicated doses.

After consuming caffeine in capsules, the perception of tiredness decreases, concentration increases and a feeling of well-being may even appear.

However, frequent consumption makes these effects less and less, which leads many people to increase the intake of the substance – then the health risks begin to appear.

Therefore, you can safely consume caffeine capsules, but it is important to remember that the best way is to bet on balance: food, rest and exercise. Respecting your own limits is essential so that there are no health risks.

Price and where to buy

Caffeine capsules can be purchased at pharmacies and supplement stores. Online portals, such as Consulta Remédios, also facilitate the purchase of the product and offer advantages when saving money.

They can be found in packages of 2, 4 or up to 60 units, also varying in the amount of caffeine in the composition. Some brand and price options are:

  • Arretado Energetic ZiinZiin box with 2 capsules : R $ 2.46;
  • Anhydrous Caffeine Bio Power 210mg, 4 Capsules : R $ 2.90;
  • Guaramil energy caps, 4 capsules : R $ 3.29;
  • Guaraná Power Sanitas box with 4 capsules : R $ 4.29;
  • Caffeine Biophisicus 420mg, bottle with 30 capsules : R $ 28.60;
  • Catarinense Caffeine 60 Capsules : R $ 30.56;
  • Liteé Caffeine Pump box with 60 capsules : R $ 50.30;
  • BPB 500mg caffeine, blister with 60 capsules : R $ 38.95;
  • Anhydrous Caffeine Health Labs 420mg, with 120 capsules : R $ 26.95;
  • Caffeine Power Stem 420mg, bottle with 120 capsules : R $ 74.95;
  • Anhydrous Rei Terra Caffeine 120 capsules : R $ 32.50.

* Prices consulted in November 2020. Prices may change.


Caffeine capsules can help studies or those days of extreme tiredness. However, it is always worth the effort when consuming, keeping the doses within the maximum daily intake. Thus, it is possible to safely enjoy the effects of the substance!

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