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Caffeine in capsules, also known as anhydrous caffeine, is a food supplement with a stimulant effect, which can be indicated to improve alertness and performance during studies and work. In addition, caffeine in capsules can also be indicated for practitioners of physical activities and people who wish to lose weight, as it favors the burning of body fat.
Caffeine capsules are obtained by extracting caffeine from food, which makes it more concentrated and therefore more potent than natural caffeine. In addition, anhydrous caffeine is quickly absorbed by the body and provides the stimulant effects within minutes of ingestion, which can last up to 8 hours.
Caffeine in capsules is found in pharmacies and food supplement stores and should only be used under the recommendation of a doctor, or nutritionist, because it can cause some side effects, and is not recommended for children under 12 years and in some situations, such as anxiety, stress and high blood pressure, for example.
What is it for
Caffeine anhydrous in capsules has direct action on the brain and acts by blocking the effects of adenosine, a substance that causes tiredness and sleep, and increasing the release of neurotransmitters such as adrenaline, noradrenaline, dopamine, glutamate and serotonin, which have a stimulating effect.
Thus, the main indications for anhydrous caffeine capsules include:
- Improve attention and concentration;
- Improve memory and learning ability;
- Increase muscle strength and endurance;
- Increase the performance of physical activity;
- Reduce tiredness and sleep;
- Improve mood;
- Decrease depression;
- Stimulate disposition and well-being;
- Improve reasoning and information processing speed;
- Improve breathing;
- Reduce the headache;
- Reduce the perception of pain.
In addition, caffeine in capsules can also help you lose weight, because it has a thermogenic effect, accelerating metabolism and stimulating the burning of body fat. However, to obtain this benefit, it is also important to practice physical activities regularly and maintain a he althy diet, with fruits, vegetables, whole grains and lean proteins. See how to eat he althy to lose weight.
How to take it
The dosage and duration of use of anhydrous caffeine in capsules varies according to the person's sensitivity to caffeine, goals and he alth status. However, the maximum recommendation should be 400mg per day, which can be taken in 1 capsule of 400 mg, or divided into 2 capsules of 200 mg, for example.
Caffeine in capsules should preferably be taken with 1 glass of water and always after breakfast and/or after lunch, to avoid stomach irritation. It is important to avoid taking caffeine capsules at night, as they can decrease the quality of sleep.
For athletes, it is recommended to take caffeine in capsules 60 minutes before physical activity to improve performance and strength. Learn how to consume caffeine in capsules to improve performance.
It is important to note that caffeine in capsules should only be used under the recommendation of a doctor, or nutritionist, because it can cause some side effects, in addition to not being indicated for children under 12 years old and in some situations, such as anxiety, stress and high blood pressure, for example.
Possible side effects
Side effects of using caffeine anhydrous capsules can occur due to brain stimulation, and include irritability, agitation, insomnia, dizziness, tremors, and rapid heartbeat. It can also have an irritating effect on the stomach and intestines, causing pain, nausea, vomiting and diarrhea.
Furthermore, a single intake of 1.2 g of caffeine or more can cause convulsions, vomiting, increased heart rate, difficulty breathing, tremors and, in some cases, death.
Consumption of anhydrous caffeine causes tolerance, and therefore increasing doses may be necessary to obtain the same effect at the beginning of the supplement use, which can cause anxiety, nervousness, insomnia or heartbeat accelerated.
Caffeine in capsules can also cause dependence, as some people, when consuming daily, may have withdrawal symptoms when its use is stopped, and may experience headache, tiredness and irritability.These effects take 2 days to 1 week to wear off.
Caffeine in capsules is not recommended for children under 12 years of age, for people with caffeine allergies, high blood pressure, stomach ulcers or who have heart diseases such as cardiac arrhythmia, for example.
The use of anhydrous caffeine should be avoided by people who suffer from insomnia, anxiety, migraine, tinnitus and labyrinthitis, as it can worsen symptoms.
Also, people who use medication should talk to their doctor before consuming food or taking supplements containing caffeine, because some medications can interact with this substance, increasing or decreasing its effect.
Other sources of caffeine
In addition to capsules, caffeine can be found in several forms, such as in coffee itself, in energy drinks or concentrated in powder form. So, to get the equivalent of 400mg of caffeine, you need about 4 200ml cups of fresh coffee a day.
Caffeine can also be found in teas, such as green tea and black tea, in cocoa, and in colas. Check out a complete list of foods rich in caffeine.