Guarana
Paullinia cupana
An Amazonian seed with one of the highest natural caffeine contents, used for energy and focus.
Traditional use (indigenous-americas): An Amazonian seed with one of the highest natural caffeine contents, used for energy and focus.
An Amazonian seed with one of the highest natural caffeine contents, used for energy and focus.
Active constituents are under study; evidence ranges from traditional use to preliminary human trials.
- An Amazonian seed with one of the highest natural caffeine contents, used for energy and focus.
Evidence strength: limited human.
- See the evidence level above
- High caffeine: insomnia, anxiety, raised heart rate/BP, palpitations; dependence.
- Caffeine sensitivity
- Heart rhythm problems
- Uncontrolled hypertension
High caffeine: insomnia, anxiety, raised heart rate/BP, palpitations; dependence.
May interact with prescription medications — review with a clinician if you take any.
Use caution in pregnancy, breastfeeding, for children, and with chronic disease unless cleared by a clinician.
Choose reputable, tested suppliers; correct identification is essential for wild-harvested plants.