Guarana, information, properties, benefits and side effects


guarana fruit



Guarana is a vine with compound leaves and flowers in bunches. The fruit (capsule) is small, red and contains a seed inside. This is a shrub native to the Amazon, found in Peru, Brazil, Colombia and Venezuela. Its scientific name is Paullinia cupana and belongs to the Sapindaceae family.

The genus is named Paul linia by Linnaeus in honor of Simon Paulli, a German botanist. In Brazil it is grown in the state of Amazonas and Bahia. In the region near the town of Maués, where it is cultivated, the Indians of the nation Sateré-Mawé have legends about the origin of the plant.

Guarana plays an important role in the culture of the Brazilian Tupi Guaraní. Guarana is a name derived from the word "wara" ná "in Tupi-Guarani means" fruit like the eyes of the people. "These tribes believed that the fruit was magic to cure intestinal diseases and a way to regain strength. They also believe in the myth of the "Divine Child" who was killed by a snake and his eyes gave life to this plant.



Unlike coffee, Guarana is not nervous but acts as reanimarte and
Refreshes the body and mind. Its component caffeine (also called guaranine) for its high content in tannins and fibre, is absorbed slowly and gently through the body.

Its stimulant action lasts 4-6 hours without side effects. Falsely said that guaranine has totally different effects than caffeine. Guaranine is the old name of caffeine. Often criticized the high percentage of caffeine, 3.5%, which is in 100g of Guarana powder. But do not pay attention to the fact that there are those who eat 100g, but 1 g of powder per serving and it contains only 40 mg of caffeine, while a cup of coffee has 80mg. Everything depends on the amount ingested .

  • Astringent Effect.
  • Prevents arteriosclerosis.
  • Removes fever.
  • Help the proper functioning of the heart.
  • Improves muscle aches and headaches.
  • Stimulates the central nervous system.
  • Increases resistance to physical activity.
  • Reduces inflammation.
  • Delays the aging.
  • Stimulates reflexes and memory.
  • Regulates gastrointestinal activity.
  • Helps remove stress, fatigue and depression.
  • It is of great support for recovery from illness nursing.



Studies show benefits with guarana in cognitive function. They have not been evaluated by the Food and Drug Administration (FDA) or other similar government agencies. In the United States, guarana has a GRAS status, for example usually conceptualized as safe and should be labelled as.

Not used to diagnose, treat, cure or prevent any disease.
The Journal of Human Nutrition and Dietetics "published in June 2001 a study showing the average weight loss of 5 kg in a group that drank a mixture of yerba mate, guarana and damiana, compared with an average of 0.5 kg loss in a placebo group after 45 days.

A university study in Brazil of guarana extract showed a 37% decrease in the formation of thromboxane from arachidonic acid. This conclusion is significant in reducing heart attacks, since the excess thromboxane formation may develop arterial failure, resulting in a heart attack or ischemic damage.
In 1997 a study from the effects of guarana in physical activity of rats showed increased memory retention and improved physical performance compared to placebo.

Other studies have shown its antioxidant, antiseptic and reducing the
Fat cells (when combined with conjugated linoleic acid).



It is a central nervous system stimulant by its caffeine content. Caffeine binds to adenosine receptors in the brain, increasing the waking state, and has an ergogenic effect (increasing the capacity to undertake physical). Pacing occurs (positive isotropic effect), peripheral vasodilatation and vasoconstriction at the head, as has been suggested for use as anti-migraine. Skeletal muscles and stimulates the breathing centre. It also increases gastric acid secretion and urine output.

In addition, the aqueous extract of Guarana has shown various pharmacological activities:


  • Improving physical fitness (in the forced swimming test).
  • Improvement of memory (compared to the amnesia induced by scopolamine),
  • Hypoglycaemic (hyperglycaemia induced by epinephrine),
  • Antioxidant ( in different models) and platelet aggregation (inhibition of platelet thromboxane synthesis in vitro).
  • Exerts its action on muscle tissue, causing the cessation of the fatigue. Also affects the central nervous system providing intellectual activity.
  • It is an effective gastrointestinal regulator.
  • As intestinal disinfectant it is adequate, both in the case of disturbances caused by fermentation, such as food poisoning and dysentery.
  • It is a general tonic, ideal for depression, low mood, fatigue, etc.
  • Assists in the expansion and maintenance of blood vessels, facilitates the circulation and helps to effectively combat arteriosclerosis. It is a  liver protector.
  • Restorative nursing ideal states, recovery from serious illness and postoperative processes.




The active ingredient or Guarana, caffeine, should not be taken with formulas that dietary products containing ephedrine or anabolic supplements. Cases have been reported lethal irregular heartbeats.

Talk to your doctor or health care professional before taking Guarana if you have:

  • Heart problems or high blood pressure.
  • Kidney disease.
  • An overactive thyroid (hyperthyroidism).
  • A disorder of anxiety or nervousness.


Guarana Capsules: 2-4 day fasting or before meals with water.
Contraindications: Children under 12, pregnant or lactating.
Composition: 100% fruit Guaraná micropulverized.



Contradicted in allergy to caffeine or other xanthenes, and in patients with serious cardiovascular (heart failure, coronary insufficiency, arrhythmia), peptic ulcer, epilepsy, insomnia, pregnancy, lactation and children under 12 years.

It is generally not recommended to use herbal drugs with caffeine during the first trimester of pregnancy as it increases the risk for spontaneous abortion. Other studies warn that caffeine can be consumed in moderation (less than 5-6 mg caffeine / kg / day) should also not consume alcohol or snuff.

Do not associate with calming effect herbal drugs or other stimulants (ginseng, Eleutherococcus, kola nut, coffee, mate, ephedra, etc). Ethinylestradiol and mestranol may increase the effect of caffeine. Cimetidine enhances the effect and toxicity of caffeine.



Guarana contains a high proportion of starch (60%), tannins catechists (up to 12%) 6% (+) - catechin, 3% (-) epicatechin, and proanthocyanidins., Catechins, resin, and as an active saponosides between 3 to 5% of caffeine or 1, 3, 7-trimethyl-xanthine, accompanied by trace amounts of theophylline and theobromine (methylbenzene, cyclic monoterpenes and sesquiterpenes, metoxifenilpropenos derived alkylphenols, estragol and anethole).

guarana capsules


  1. You indicated 2-4 capsules as a doseage, how many miligrams or if I am buying guarana in bulk what would be a standard dose in teaspoons.

  2. hi i did drienk the guarana sponged with whisky jonny walker red label it was fine I like it no hangovers.

  3. I am apparently quite allergic to this Guarana. I wonder if my case is unique. First time I had it was 17 years ago in a soft drink called Josta which I don´t think they make anymore. It caused me to have a panic attack where I felt severe angina (chest pain) and like I couldn´t breathe. Since then I have avoided it and I do not use "energy drinks". Most nowadays contain guarana. I am aware that I am somewhat caffeine sensitive but I still drink coffee on a semi-regular basis in moderation. I notice there is some difference in the intensity of effects of various caffeinated drinks besides coffee such as Black and Green Tea, Yerba Mate, and Guayusa. However I hav never experienced the intense adverse effects that I got from guayusa with other caffeine sources, so I think there must be something uniquely different about its form of caffeine and or accompany alkaloid profile which is different from coffee and teas. I just used a couple of herbal energy tablet over the past two days in a split dose fashion. I was aware that the pills contained guarana as one of their component extracts. It said that one pill only contained 60 mgs of caffeine of which the guarana was only one component along with green tea, and yerba mate extracts. I had one of two sample tablets yesterday and the day before. The effects were the same; collapse of my autonomic respiratory function(found myself not breathing) combined with extreme angina and overall tiredness. I do not like guarana. I beleive I am allergic to it. I will not use it anymore for the rest of my life if I can help it.

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