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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Rhodiola and Reduced Rating of Perceived Exertion

Research synthesisVery low evidenceSmall effect3 studies · 2 beneficial · 1 neutral · 0 harmful

Across 3 studies, 2 reported beneficial effects (1 moderate, 1 small) and 1 reported a neutral effect on perceived exertion, indicating a predominantly small-to-moderate benefit. The most-studied population is athletes, and the median study duration across reporting studies was 28 days. Evidence is limited by the small number of studies available.

  • Effective dose range: 2.4 g·day⁻¹
  • Studied populations: athletes

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. One systematic review (2022) reported neutral findings, suggesting inconsistency across analyses. The beneficial studies included a systematic review with mixed populations, and the only trial providing a dose used 2.4 g/day in male soccer players; generalizability to other populations and doses is unclear.

Generated Jun 11, 2026
Doses used in studies
  • g/day: 2.4 (median 2.4, IQR 2.4–2.4) — 1 study
Time to effect
Median: 4 weeks · IQR 4 weeks–4 weeks · Range 4 weeks–4 weeks — Reported in 1 of 3 studies
3 of 3 papers
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