Guarana
Medical Testing
Testing has been limited and most tests have been done on rats. In rats Guarana improved memory retention and also increased physical endurance, there have been limited tests on small human samples which produced the same results.
Side Effects
The side effects which Guarana can have are the same as coffee and include – nervousness, irritability, insomnia and vomiting, stomach irritation, nausea and just like coffee, it can produce a dependency on both a mental and physical level. Finally, just like coffee, Guarana is considered a safe supplement for most people to eat or drink.
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