CICoach ImpactOS

Evidence Lab

Rhodiola rosea

Rhodiola rosea has emerging evidence for small endurance-related benefits, but trials are heterogeneous and authoritative reviews still consider the overall clinical evidence insufficient. Product standardization and short-term safety matter.

Evidence rating: Emerging / Mixed

Published 8/14/2026 | Last reviewed 8/14/2026

Overview

Rhodiola rosea is a botanical traditionally used for fatigue, work capacity and stress. Modern supplements are usually standardized extracts, but rosavin and salidroside content varies across products. A 2025 meta-analysis of randomized trials reported small improvements in VO2max, time to exhaustion and time-trial performance. Earlier systematic review work also found some acute endurance and perceived-exertion signals, but studies differ substantially in dose, duration, extract composition, training status and methodology. NCCIH therefore continues to state that there is not enough reliable evidence to determine whether rhodiola is useful for any health-related purpose. The balanced coaching interpretation is that rhodiola is an emerging rather than established ergogenic aid. A possible small endurance benefit should not displace sleep, fueling, hydration, training design or evaluation of persistent fatigue.

Common use

Experimental support for fatigue or endurance contexts; not an established replacement for recovery, nutrition or medical assessment.

Common forms

Standardized Rhodiola rosea root extracts, capsules or tablets. Rosavin and salidroside content and extract ratios vary between products.

Practical notes

Use only clearly identified Rhodiola rosea products with transparent standardization. Avoid assuming that study doses translate across extracts. Last evidence review: 14 August 2026.

Claim-level evidence

Emerging / Mixed

Rhodiola may produce small improvements in selected endurance outcomes.

Population: Healthy adults and athletes in randomized exercise trials.

There is a plausible endurance signal, but it is not robust enough to guarantee benefit for an individual athlete.

Limitations: Trials are heterogeneous in extract, dose, duration, training status and outcome selection.

Insufficient

Rhodiola is not established as a broad treatment for fatigue, stress, mood or cognition.

Population: General adult population.

Avoid extending exercise findings into broad medical or mental-health claims.

Limitations: NCCIH states that reliable evidence is insufficient for any health-related purpose.

Emerging / Mixed

Acute and chronic protocols cannot be assumed to have the same effect.

Population: Healthy active adults.

Match expectations to the actual type of study rather than treating all rhodiola use as one intervention.

Limitations: Studies range from single-dose to multiweek protocols and use different standardized extracts.

Dosing context

  • Exercise research context - Trials use varied standardized extracts and several-hundred-milligram daily doses; no universally validated athlete dose exists. - Some studies use an acute pre-exercise dose, while others use daily supplementation. - Single-dose through several weeks.Extract composition matters; milligram doses are not interchangeable between products.
  • Short-term safety context - Use only within labeled or study-supported ranges rather than escalating for fatigue. - Earlier in the day may be preferable if insomnia occurs. - NCCIH describes possible safety up to 12 weeks.Long-term safety is not established.

Safety notes

  • Insomnia, dizziness or headacheRhodiola can cause insomnia, dizziness or headache in some users; stop or adjust use if it worsens sleep or daily function.
  • Pregnancy and breastfeedingThere is insufficient safety information for pregnancy or breastfeeding; avoid unsupervised use.
  • Medication useA losartan interaction has been reported and broader interaction data are limited; review use with a clinician or pharmacist when taking prescription medicines.

Interactions

  • LosartanNCCIH notes a reported interaction with losartan. People using this or other blood-pressure medicines should seek clinician or pharmacist guidance.
  • Persistent unexplained fatigueDo not use rhodiola to mask persistent fatigue that could reflect under-recovery, low energy availability, anemia, illness, sleep disorder or another medical problem.

References

  1. Wang X, Yang X, Gao Z, Zeng J, Liu Y. The effect of Rhodiola rosea supplementation on endurance performance and related biomarkers: a systematic review and meta-analysis Frontiers in Nutrition. 2025.Source
  2. National Center for Complementary and Integrative Health. Rhodiola: Usefulness and Safety NCCIH. 2026.Source
  3. Sanz-Barrio PM, et al.. Effects of Rhodiola rosea supplementation on exercise performance and related outcomes: a systematic review Phytotherapy Research. 2023.Source