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Guarana is an herbal supplement that is commonly used for weight loss or as an energy supplement. Its active ingredient is caffeine, which works as a nervous system stimulant and diuretic. At this time, no research studies have been conducted on the effectiveness of guarana for weight loss. Although low doses are probably safe, high doses could potentially cause problems.How Does It Work?
Many people are not aware that the active component of guarana is actually
caffeine. The berries of the plant have a high caffeine content (even more
than coffee beans). Caffeine works as a nervous system stimulant and as a
diuretic (a "water pill").
There is a lack of scientific evidence to support a conclusion that the
supplement is effective for weight loss. No adequate research studies have
been performed and published using this substance for weight loss.
Side Effects
Guarana can cause several side effects, such as:
(Click Guarana
Side Effects to learn more, including potentially serious side effects
that you should report immediately to your healthcare provider.)
It can interact with a number of different medications (see Guarana
Interactions).
Low doses of it are probably safe, although high doses can cause problems.
Some people may be more likely to experience problems due to interactions with
drugs and supplements. Therefore, you should talk with your healthcare
provider prior to taking this supplement if you have:
Also, let your healthcare provider know if you are:
Make sure to tell your healthcare provider about all other medicines you are
taking, including prescription and non-prescription medicines, vitamins, and
herbal supplements.
What If I Take an Overdose?
Since the substance contains a large amount of caffeine, it is possible to
develop adverse effects if you take too much of it. People who take too much
guarana may experience the following symptoms:
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