Does guarana work?

Overall Effectiveness Rating for Guarana

The overall effectiveness rating for guarana is 2 out of 3. This rating means there is some evidence that using guarana may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.

Overall Confidence Rating for Guarana

There is one study in the database on guarana; the confidence rating is 20. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for guarana as a whole. There are also individual ratings for the claims below.

Products Containing Guarana

Products Containing Guarana
Player 1 Gaming Fuel
Shred Her
Full list of all 12 products containing Guarana.

Individual Claims

The overall ratings above do no necessarily reflect each claim about guarana. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Mental Health Claims Effectiveness Rating Confidence Rating
improve cognitive ability


Title of Study
Improved cognitive performance and mental fatigue following a multi-vitamin and mineral supplement with added guaran√° (Paullinia cupana)