Evidence brief · Supplement
Guarana for Alertness / metabolic (via caffeine)
Evidence grade C — Caffeine-driven
- Overall grade
- Grade C
- Last revised
- 1
- graded outcome
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
1 at grade C — 1 graded row
What is known
Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.
- Alertness / metabolic (via caffeine)Evidence grade C
Caffeine-driven
Smallhigh
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Thin evidence: Alertness / metabolic (via caffeine) (grade C).
The evidence in words
The verdict
For alertness / metabolic (via caffeine), Guarana earns evidence grade C (small effect, high consistency) — the evidence is limited or mixed. Caffeine-driven
How it might work
Its effects are largely caffeine's, possibly released more slowly due to the tannin matrix.
How to use it
Safety & cautions
Caffeine-driven — jitter, insomnia, cardiovascular load; easy to over-caffeinate in stacks.
Bottom line
Basically caffeine with extra steps. Fine as a stimulant source; count it toward your caffeine total.
Goes with
- GuaranaRead the full Guarana monographEvidence grade C
Related reading
Entries that share this one's tags or conditions.
- Caffeine for Alertness / reaction timeEvidence grade A — Acute, tolerance-limitedEvidence grade A
- Caffeine for Endurance performanceEvidence grade A — Well establishedEvidence grade A
- Caffeine for Sleep (afternoon dosing)Evidence grade A — Degrades sleep — the key costEvidence grade A
- Caffeine for Strength / powerEvidence grade B — Smaller effectEvidence grade B
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.