Rhodiola rosea for Mental Fatigue
BMultiple RCTs demonstrate significant reduction in mental fatigue and improved concentration during stressful periods. Rosavin and salidroside appear to be the primary active compounds supporting cognitive endurance.
The Bottom Line
Multiple RCTs demonstrate significant reduction in mental fatigue and improved concentration during stressful periods. Rosavin and salidroside appear to be the primary active compounds supporting cognitive endurance.
Key Study Findings
Population: Young healthy individuals (7 women, 11 men)
Population: Depression patients
Population: Chronically stressed but healthy subjects
Population: None
Population: None
Population: Adults with mental and behavioral disorders
Key Statistics
11
Studies
900
Participants
Positive
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 200-600 mg/day standardized to 3% rosavins and 1% salidroside
Upper limit: Not established; doses up to 680 mg/day used in trials
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| 4 days supplementation | -- | Positive | 18 |
| None | -- | Mixed | -- |
| None | 4.3 weeks | Positive | -- |
| None | -- | Mixed | -- |
| None | 4 weeks | Mixed | -- |
| None | -- | Positive | -- |
| None | -- | Positive | -- |
| None | -- | Mixed | -- |
Best taken: Morning on empty stomach; avoid evening (may be stimulating)
Safety & Side Effects
Reported Side Effects
- ⚠ Insomnia or overstimulation (if taken late)
- ⚠ Dry mouth
- ⚠ Dizziness
- ⚠ Mild agitation
Known Interactions
- ● Antidepressants (SSRIs, MAOIs — additive serotonergic effects)
- ● Antidiabetic drugs (may lower blood sugar)
- ● Stimulant medications (additive stimulatory effects)
- ● Immunosuppressants (may modulate immune response)
Tolerable upper intake: Not established; doses up to 680 mg/day used in trials
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Rhodiola rosea help with Mental Fatigue?
How much Rhodiola rosea should I take for Mental Fatigue?
Are there side effects of Rhodiola rosea?
How strong is the evidence for Rhodiola rosea and Mental Fatigue?
Related Evidence
Other ingredients for Mental Fatigue
Rhodiola rosea for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.