Optimum Nutrition
THE BIOHACKING STANDARD
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Everything Vyvata knows about this product — the score, the evidence, the FAQ, and where else to find shopper reviews. No hidden data. Every vendor is scored on the same published rubric — no brand can pay for placement. Read the rubric →
Ashwagandha (Withania somnifera) has among the strongest adaptogen evidence bases in the supplement category, with multiple RCTs for cortisol reduction, perceived stress, sleep quality, and — relevant to this product's positioning — modest gains in strength and VO2max (Wankhede 2015; Bonilla 2021 meta-analysis). Effective doses are 300–600 mg/day of standardized extract (typically KSM-66 or Sensoril). Muscle Faktor does not specify the extract type or standardization percentage on the listing, which caps the score below Verified. Assuming a competent generic extract at 600 mg, the product is legitimately useful for its athletic-performance positioning.
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.
FAQ data has not been generated for this product yet. See the site FAQ for general questions.
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.
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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.

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