Facts & Fiction

Guarana contains a high amount of guaranine, a chemical substance with the same characteristics as caffeine. This makes Guarana a stimulant similar to coffee, which means that it:

  • quickens perceptions
  • delays sleep
  • helps with endurance based activities
  • can help to recover from a hangover
  • impairs the appetite
  • will lead to more frequent visits to the toilet
  • causes a higher blood pressure and an increased heart rate
  • can make you feel jittery and may prevent sleep at all.



Guarana is not:

  • a 'miracle medicine'
  • a dangerous drug
  • an easy way to lose weight
  • a vitamin
  • a food supplement

Not proven by scientific research, but some users state that:

  • Guarana is a 'Smart Drug'
  • Guarana is an aphrodisiac
  • their health improved thanks to guarana


  • Theoretically, it is possible to overdose on caffeine or guarana. The fatal dose has been estimated at 10 grams of pure caffeine / guaranine (taken at once!). Guarana seeds contain maximal 10% caffeine, so when you would swallow at least 100 grams guarana seeds at once, things start to look ugly. Our advice: don't even think about it.
    To put all of this in perspective: the average cup of coffee contains 65-130 milligrams of caffeine; some very strong guarana-based syrups can contain up to 350 milligrams.  Look at our caffeine chart for more info.
  • People with cardiac problems or a high blood pressure should avoid Guarana (and smoking or drinking coffee, for that matter) When in doubt - consult your doctor.
  • As with all stimulants, dependency may occur.

Chemical composition of Guarana seeds:

Vegetable fiber: 49.125 %
Reddish resin: 8.800 %
Starch: 8.350 %
Water: 7.650 %
Pectin, malic acid, mucilage, dextrin, salts: 7.470 %
Guarana-tannic acid: 5.902 %
Caffeine: 5.388 %
Yellowish steady oil: 2.950 %
Pyro-guarana acid: 2.750 %
Reddish colorant: 1.520 %
Amorphous substances: 0.606 %
Saponin: 0.060 %

Copyright © 2004-2013 Hans van Rijsse. All rights reserved.