Automated research refresh updated the product evidence set.
Before: Evidence 81 · Safety 74 · Effectiveness 78 · Confidence 75
After: Evidence 86 · Safety 72 · Effectiveness 79 · Confidence 83
Ashwagandha KSM-66 600mg (Standardized Root Extract)
A standardized KSM-66 ashwagandha root extract at the 600 mg/day dose used in several stress and anxiety trials. Marketed for stress resilience, not as a treatment for any anxiety disorder.
Ingredient-level evidence5 papers indexed · 3 claims mapped
Resar evidence panel
0–100 · cited research only
Evidence Score
86
Excellent
Safety Score
72
Strong
Effectiveness Score
79
Strong
Research Confidence
83
Strong
Product Fit Score
74
Strong
Bottom line
Strong evidence (Excellent) for mental health — worth a closer look if this fits your goals.
Individual results vary. Summaries are educational — not medical advice.
Evidence Score
86
Excellent
Price
$19.95
Resar may earn an affiliate commission on this purchase. Commissions never change scores — see our affiliate disclosure and conflicts policy. Scores reflect cited research, not medical advice.
Compare others in Mental HealthTop research
The strongest studies behind this product
Ranked by evidence hierarchy and how closely each study matches this product. Start with the strongest study, then read down. Every claim needs a trail.
Strongest studyIndirect synthesis49% relevance
Does Ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials
Meta Analysis · Phytotherapy research : PTR · 2022
What the research shows
The likely user benefit should be interpreted cautiously until the full paper is reviewed for everyday use aligned with the product's intended purpose.
Category-level evidenceRead study
2345
Indirect synthesis49% relevance
Effects of Withania somnifera (Ashwagandha) Supplementation on Exercise Performance: A Systematic Review and Three-Level Meta-Analysis
Meta Analysis · Nutrients · 2026
Category-level evidence
Human RCT73% relevance
A standardized Ashwagandha root extract alleviates stress, anxiety, and improves quality of life in healthy adults by modulating stress hormones: Results from a randomized, double-blind, placebo-controlled study
Randomized Controlled Trial · Medicine · 2023
Ingredient-level evidence
Human RCT73% relevance
Prospective, Randomized, Multi-centric, Double-Blind, Placebo-Controlled Study Evaluating the Efficacy and Safety of KSM-66 Ashwagandha (Withania somnifera) in Adults Experiencing High Stress and/or Anxiety: Clinical Study Protocol
Randomized Controlled Trial · D Y Patil Journal of Health Sciences · 2026
Ingredient-level evidence
Human RCT73% relevance
Efficacy and safety of standardized Ashwagandha (Withania somnifera) root extract on reducing stress and anxiety in domestic dogs: A randomized controlled trial
Randomized Controlled Trial · Journal of Veterinary Behavior · 2022
Ingredient-level evidence
Scores reflect these cited studies, not medical advice. Expand the full evidence detail below for protocols, dose context, and reported side effects.
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Claim ledger
Every claim, mapped to its source
Each product claim below is tied to a specific paper with study type, match strength, and limitations. Nothing here is medical advice — it is a research trail you can audit.
Claim match reflects how closely a specific paper supports this benefit — not AI confidence or medical certainty.
ClaimEvidence directnessMatchStudy type
Full evidence detail
Study-by-study breakdown
Each paper below is ranked for this listing. Start with the highest match, then expand any study for a plain-language readout.
How to read this section
- Match % - how closely the study matches this product (not overall scientific quality).
- Evidence type - study design (RCT, review, etc.) and whether it is direct, category-level, or indirect.
- What it found - short summary and quoted extract from the paper metadata. Not medical advice.
Category-level evidenceTreat this as background context - the link to this product is weak.
In plain language
Meta-Analysis; Systematic Review; Journal Article [1]
What the study reported
Verified extract — not AI generated
“The likely user benefit should be interpreted cautiously until the full paper is reviewed for everyday use aligned with the product's intended purpose.”
Dose in the study
Use context could not be reliably extracted from metadata alone and should be verified during curation.
Side effects noted
No adverse effects reported in the indexed studies.
Caveats
This fallback uses metadata ranking and should be upgraded with full AI or manual review before stronger claims.
Transparency
Score history
Human review is pending for this listing.
Reviews
Shopper feedback
4.5
average rating
11,870 Amazon reviews were available from the listing metadata.