Reviewed by the Scan Dose Research Team and Clinical Advisory Board
Rhodiola Rosea
MODERATE EVIDENCEAdaptogenLast updated April 5, 2026
SCAN DOSE SUMMARY
Rhodiola rosea is an adaptogenic herb traditionally used for fatigue, stress, and cognitive function. Our assessment: moderate evidence supports its anti-fatigue effects and potential mood benefits, but studies are generally small and short-term. It's one of the better-studied adaptogens after ashwagandha, with a favorable safety profile.
EVIDENCE GRADES
FatigueModerate
B
Subjective well-beingModerate
B
Cognitive function under stressLimited
C
DepressionLimited
C
OPTIMAL DOSAGE
For fatigue/stress: 200-600mg/day of standardized extract (3% rosavins, 1% salidroside)