NutraBio Ashwagandha KSM-66 - 60 Capsules

Elite

Stress mood mental

Evidence
Safety
Formulation
Transparency
Sustainability
Manufacturing

How we scored this — 85/100

[Rescored via evidence crawl] Previous score 76 → new 85. Evidence found: Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian J Psychol Med. 2012;34(3):255-262. | Lopresti AL et al. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract. Medicine (Baltimore). 2019;98(37):e17186. | Salve J et al. Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults. Cureus. 2019;11(12):e6466.. Rationale: KSM-66 is the most-studied branded ashwagandha extract with multiple positive RCTs at 600 mg/day for stress, cortisol, and anxiety (Chandrasekhar 2012, Lopresti 2019, Salve 2019). NutraBio's KSM-66 sourcing + full label transparency puts this at Elite tier.

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Analysis Evidence FAQ Reviews All Data

85/100

Elite

Six-dimension breakdown

Evidence

Formulation

Manufacturing

Safety

Transparency

Sustainability

Why this scored 85/100

Last scored: August 25, 2026Full rubric →

Evidence & sources

The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.

Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.

How to read the Evidence dimension

80–100: Multiple double-blind RCTs in indexed journals directly testing this product OR the exact ingredients at the exact dose.
60–79: Single double-blind RCT + supporting ingredient literature at the studied dose.
40–59: Open-label trials + ingredient literature; no product-specific double-blind evidence.
20–39: Ingredient literature only; no product-specific trials or trials in predatory venues.
0–19: No credible evidence base or unverifiable claims.

Frequently asked questions

Auto-generated from Vyvata's scoring data for this product. For general questions about the store (shipping, returns, wholesale), see the site FAQ.

What is NutraBio Ashwagandha KSM-66 - 60 Capsules?

NutraBio Ashwagandha KSM-66 - 60 Capsules is a product from Ultimate Sport Nutrition, categorized under Stress, mood & mental wellness in the Supplements vertical. It is scored on the Vyvata Scoring Framework — an independent 6-dimension rubric applied uniformly to every product Vyvata lists.

How does NutraBio Ashwagandha KSM-66 - 60 Capsules score on the Vyvata rubric?

76/100 overall — Verified tier (70–84 band). Per-dimension breakdown: Evidence 82, Transparency 82, Formulation 80, Manufacturing 76, Safety 72, Sustainability 62. Scored as of 2026-08-24.

Why did NutraBio Ashwagandha KSM-66 - 60 Capsules score in the Verified tier?

NutraBio is one of the most transparent-labeling US supplement brands (full-disclosure labels, in-house cGMP facility, published lot-level CoAs) and KSM-66 is the most clinically studied ashwagandha extract on the market — Chandrasekhar 2012 and Lopresti 2019 both used KSM-66 at 300-600 mg/day to demonstrate cortisol reduction and stress-scale improvements. Combining a serious manufacturer with a clinically-validated branded extract puts this comfortably in Verified. Below Elite because sustainability sourcing for withania isn't publicly documented and there is no NSF/Informed Sport certification on this SKU. Would move to Elite 85+ with third-party sport certification and a documented sustainability chain from farm to bottle.

What are the strongest and weakest aspects of this product?

Strongest: Evidence at 82/100 (quality of published RCT support for the active ingredients at the label dose) and Transparency at 82/100 (dose disclosure vs proprietary blends, and honesty of marketing claims). Weakest: Safety at 72/100 (adverse-event profile, interaction risk, and dose ceiling) and Sustainability at 62/100 (sourcing practices, packaging, and corporate practice). All six dimensions feed the overall Vyvata score; a weakness on any one dimension pulls the overall down proportionally.

Is NutraBio Ashwagandha KSM-66 - 60 Capsules third-party tested?

No third-party certifications (NSF, USP, ConsumerLab, or equivalent) were on record at the time of scoring. This affects the Manufacturing dimension score. The manufacturer may test internally or have obtained certification more recently — check the current product label for the most up-to-date information.

What would move NutraBio Ashwagandha KSM-66 - 60 Capsules to a higher tier?

Would move to Elite 85+ with third-party sport certification and a documented sustainability chain from farm to bottle.

Are there higher-scoring alternatives to NutraBio Ashwagandha KSM-66 - 60 Capsules?

The top-ranked stress, mood & mental wellness product in the Vyvata catalog is currently Momentous Sleep at 77/100. See the full ranked list of 247 scored products in this subcategory at https://vyvata.com/pages/best-stress-mood-and-mental-wellness-supplements-ranked.

What does the Vyvata score mean?

The Vyvata Scoring Framework rates every listed product 0–100 across six dimensions: Evidence, Formulation, Manufacturing, Safety, Transparency, and Sustainability. Tier bands: Elite 85–100 (top-tier evidence + formulation + manufacturing), Verified 70–84 (strong on most dimensions), Standard 50–69 (solid but with weaknesses called out), Rejected 0–49 (specific failures documented). Rejected products remain listed with reasons. Full methodology at https://vyvata.com/pages/methodology.

Where can I read customer reviews for NutraBio Ashwagandha KSM-66 - 60 Capsules?

The Vyvata score measures product integrity against a published rubric, not customer sentiment. For customer reviews and community discussion, search external platforms directly: Amazon (https://www.amazon.com/s?k=Ultimate%20Sport%20Nutrition%20NutraBio%20Ashwagandha%20KSM-66%20-%2060%20Capsules),Google(https://www.google.com/search?q=Ultimate%20Sport%20Nutrition%20NutraBio%20Ashwagandha%20KSM-66%20-%2060%20Capsules+reviews),Reddit(https://www.reddit.com/search/?q=Ultimate%20Sport%20Nutrition%20NutraBio%20Ashwagandha%20KSM-66%20-%2060%20Capsules%20review),andTrustpilot(https://www.trustpilot.com/search?query=Ultimate%20Sport%20Nutrition%20NutraBio%20Ashwagandha%20KSM-66%20-%2060%20Capsules).Vyvatadoesnotaggregate,republish,orlicensethosethird-partyreviews.

Customer reviews

Reviews on other platforms

The Vyvata score measures product integrity against a published rubric, not customer sentiment. Vyvata does not aggregate, republish, or license third-party reviews — the links below open search pages on their respective platforms.

All the data we have on this product

Every VSF-related metafield surfaced verbatim. Nothing hidden. If you spot data that looks wrong, let us know.

VSF score: 85 / 100
Tier: Elite
Category: Supplements
Subcategory: stress mood mental
Last scored: August 25, 2026
Third-party certifications: None on record at time of scoring
Vendor: Ultimate Sport Nutrition
Product type: Repair & Recovery
Tags: Shopify Collective, Ultimate Sport Nutrition

Every score is set from the published rubric, audit-logged, and rescored whenever new evidence emerges (published trials, updated labels, third-party testing releases). Every vendor is scored on the same criteria — no pay-to-play. See our editorial-independence disclosure for the full policy, including brands with an editorial relationship to this site.