Stimulant
Guarana
A plant-based stimulant containing caffeine, used to enhance energy and alertness.
KÖGN Health grades Guarana as A (Strong evidence) and rates it 4.1 out of 5.
Last reviewed · June 2026
Primary effects
- Increased energy
- Improved focus
- Reduced fatigue
How it works
Provides a sustained release of caffeine, improving alertness and reducing fatigue.
Overview
Guarana contains caffeine along with other compounds that slow its release, leading to a more sustained energy boost compared to coffee. It is commonly used in energy and performance formulations. While effective for focus and alertness, it shares similar limitations to caffeine, including potential tolerance and overstimulation at higher doses.
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.