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

Research synthesisLow 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 reducing perceived exertion with Rhodiola supplementation. The evidence is preliminary but suggests a small-to-moderate beneficial effect, primarily observed in athletes (e.g., male collegiate soccer players) with a studied dose of 2.4 g/day over 28 days.

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

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. The neutral study was a systematic review with only 10 participants and did not reach statistical significance, suggesting effect may be inconsistent or smaller than initial positive studies indicate.

Generated Jul 12, 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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