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    Evidence Comparison

    Compare Ingredients

    Compare the research strength, evidence scores, goal ratings, and safety profiles of up to 4 ingredients side by side.

    Data last reviewed: 2024-07-01

    AshwagandhaRhodiola Rosea

    Who wins on evidence?

    Ashwagandha winsby 4 pts (82% vs 78%)

    Averaged across overall, human clinical, meta-analysis, mechanistic, real-world and safety scores.

    Ashwagandha82%
    Overall: 82/100Human Clinical: 85/100Meta-Analysis: 78/100Mechanistic: 80/100Real-World: 84/100Safety: 82/100
    Rhodiola Rosea78%
    Overall: 76/100Human Clinical: 74/100Meta-Analysis: 68/100Mechanistic: 82/100Real-World: 78/100Safety: 88/100

    Verdict is calculated from objective evidence signals only (clinical research volume, evidence quality, validation markers). It does not account for individual goals or tolerability.

    Evidence Scores

    Overall
    Ashwagandha
    82★
    Rhodiola Rosea
    76
    Human Clinical
    Ashwagandha
    85★
    Rhodiola Rosea
    74
    Meta-Analysis
    Ashwagandha
    78★
    Rhodiola Rosea
    68
    Mechanistic
    Ashwagandha
    80
    Rhodiola Rosea
    82★
    Real-World
    Ashwagandha
    84★
    Rhodiola Rosea
    78
    Safety
    Ashwagandha
    82
    Rhodiola Rosea
    88★

    Research Volume

    Metric
    Ashwagandha
    Rhodiola Rosea
    Evidence Level82/10076/100
    Total Studies32
    Human Trials11
    Meta-Analyses10
    Latest Study20232012
    Athlete Studies11
    CategoryAdaptogensBotanical Extracts
    OriginNaturalNatural
    Trademarks2—

    Goal Ratings

    Stress
    Ashwagandha
    5
    Rhodiola Rosea
    4.5
    Sleep
    Ashwagandha
    4
    Rhodiola Rosea
    —
    Recovery
    Ashwagandha
    4
    Rhodiola Rosea
    3
    Hormonal Support
    Ashwagandha
    4
    Rhodiola Rosea
    —
    Endurance
    Ashwagandha
    2
    Rhodiola Rosea
    4
    General Health
    Ashwagandha
    4
    Rhodiola Rosea
    3
    Focus
    Ashwagandha
    —
    Rhodiola Rosea
    4
    Cognition
    Ashwagandha
    3
    Rhodiola Rosea
    3.5
    Muscle Gain
    Ashwagandha
    3
    Rhodiola Rosea
    —
    Strength
    Ashwagandha
    3
    Rhodiola Rosea
    —
    Fat Loss
    Ashwagandha
    —
    Rhodiola Rosea
    2

    Safety Overview

    Aspect
    Ashwagandha
    Rhodiola Rosea
    Safety Score82/10088/100
    Side EffectsMild GI discomfort (rare); Drowsiness at higher dosesMild dizziness (rare); Dry mouth
    ContraindicationsPregnancy and lactation; Autoimmune thyroid conditionsBipolar disorder (may trigger mania)
    Drug Interactions3 known3 known
    Effective Dosage300–600mg/day of root extract standardized to ≥5% withanolides400–600mg/day

    Quick Verdict

    Ashwagandha
    82/100

    3 studies · 1 meta-analyses

    StressSleepRecovery
    Rhodiola Rosea
    76/100

    2 studies

    StressEnduranceFocus

    Citations

    Ashwagandha(3 studies)

    1. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of ashwagandha root extract (2012, RCT) https://pubmed.ncbi.nlm.nih.gov/23439798/
    2. Effects of ashwagandha on muscle strength: a systematic review (2023, Systematic Review) https://pubmed.ncbi.nlm.nih.gov/35345887/
    3. Adaptogenic and anxiolytic effects of ashwagandha root extract: a systematic review and meta-analysis (2021, Meta-Analysis) https://pubmed.ncbi.nlm.nih.gov/34254920/

    Rhodiola Rosea(2 studies)

    1. Rhodiola rosea for physical and mental fatigue: a systematic review (2012, Systematic Review) https://pubmed.ncbi.nlm.nih.gov/22643043/
    2. Acute Rhodiola rosea intake can improve endurance exercise performance (2004, RCT) https://pubmed.ncbi.nlm.nih.gov/14713323/