The effectiveness and efficacy of Rhodiola rosea L.: a systematic review of randomized clinical trials.
R. rosea may have beneficial effects on physical performance, mental performance, and certain mental health conditions. There is, however, a lack of independent replications of the single different studies. Five of the 10 RCTs reached more than three points on the Jadad score (i.e., good quality). More research seems warranted.
Systematic review
9 effects