Evidence brief · Supplement
Rhodiola Rosea for Cognition under fatigue
Evidence grade C — Small
- 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.
- Cognition under fatigueEvidence grade C
Small
Smallmixed
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Thin evidence: Cognition under fatigue (grade C).
The evidence in words
The verdict
For cognition under fatigue, Rhodiola Rosea earns evidence grade C (small effect, mixed consistency) — the evidence is limited or mixed. Small
How it might work
It appears to modulate the stress response and monoamine signaling and to support cellular energy metabolism, buffering the performance drop that mental and physical fatigue cause.
How to use it
200–400 mg of a standardized extract (3% rosavins / 1% salidroside) in the morning; it can be over-stimulating late in the day.
Safety & cautions
Well tolerated; occasional jitteriness or vivid dreams. Its activating nature stacks with other stimulants.
Bottom line
The daytime, anti-fatigue adaptogen. 200–400 mg standardized in the morning for stress-driven tiredness and burnout; keep it away from bedtime.
How it is used
As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.
- Morning
- 200–400 mg standardized extract.
Goes with
- Rhodiola RoseaRead the full Rhodiola Rosea monographEvidence grade B
Related reading
Entries that share this one's tags or conditions.
- Rhodiola Rosea for Burnout / chronic fatigueEvidence grade C — Promising but limitedEvidence grade C
- Rhodiola Rosea for Fatigue / burnoutEvidence grade B — Best-supported useEvidence grade B
- Rhodiola Rosea for Stress symptomsEvidence grade B — Subjective improvementEvidence grade B
- Rhodiola Rosea: dosage and how to take it200–400 mg standardized extract.Evidence 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.