Optimum Nutrition
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[Rescored via evidence crawl] Previous score 71 → new 80. Evidence found: Yin J, Xing H, Ye J. Efficacy of berberine in patients with type 2 diabetes mellitus. Metabolism. 2008;57(5):712-717. | Lan J et al. Meta-analysis of the effect and safety of berberine in the treatment of type 2 diabetes mellitus, hyperlipidemia and hypertension. J Ethnopharmacol. 2015;161:69-81. | Dong H et al. Berberine in the Treatment of Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis. Evid Based Complement Alternat Med. 2012;2012:591654.. Rationale: Thorne's 'Dual Action' formula combines berberine with sustained-release delivery for reduced GI side effects — a legitimate reformulation for one of berberine's main tolerability limitations. Berberine ingredient class has TIER-A meta-analytic evidence for HbA1c reduction (~0.9%, comparable to metformin in some meta-analyses). Uplift to 80 for practitioner-grade brand + strong evidence + delivery innovation.
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.
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THORNE Berberine – Dual Action Formula (Pack of 2) – 120 Capsules Total is a product from Thorne, categorized under Weight management & metabolic health in the Supplements vertical. It is scored on the Vyvata Scoring Framework — an independent 6-dimension rubric applied uniformly to every product Vyvata lists.
71/100 overall — Verified tier (70–84 band). Per-dimension breakdown: Manufacturing 78, Evidence 72, Formulation 72, Safety 68, Transparency 68, Sustainability 55. Scored as of 2026-08-24.
Genuine Thorne Berberine — 450 mg HCl + 550 mg Phytosome per serving — resold via Ballimart. Berberine 500 mg TID has HbA1c and lipid RCTs comparable to metformin (Yin 2008). Thorne QA anchors Verified; Amazon reseller provenance shaves a few points off Elite.
Strongest: Manufacturing at 78/100 (third-party testing, GMP compliance, and facility audit status) and Evidence at 72/100 (quality of published RCT support for the active ingredients at the label dose). Weakest: Transparency at 68/100 (dose disclosure vs proprietary blends, and honesty of marketing claims) and Sustainability at 55/100 (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.
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.
The top-ranked weight management & metabolic health product in the Vyvata catalog is currently Thorne Berberine Dietary Supplement 1000 mg 60 Capsules at 80/100. See the full ranked list of 218 scored products in this subcategory at https://vyvata.com/pages/best-weight-management-and-metabolic-health-supplements-ranked.
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.
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=Thorne%20THORNE%20Berberine%20%E2%80%93%20Dual%20Action%20Formula%20(Pack%20of%202)%20%E2%80%93%20120%20Capsules%20Total),Google(https://www.google.com/search?q=Thorne%20THORNE%20Berberine%20%E2%80%93%20Dual%20Action%20Formula%20(Pack%20of%202)%20%E2%80%93%20120%20Capsules%20Total+reviews),Reddit(https://www.reddit.com/search/?q=Thorne%20THORNE%20Berberine%20%E2%80%93%20Dual%20Action%20Formula%20(Pack%20of%202)%20%E2%80%93%20120%20Capsules%20Total%20review),andTrustpilot(https://www.trustpilot.com/search?query=Thorne%20THORNE%20Berberine%20%E2%80%93%20Dual%20Action%20Formula%20(Pack%20of%202)%20%E2%80%93%20120%20Capsules%20Total).Vyvatadoesnotaggregate,republish,orlicensethosethird-partyreviews.
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.
Every VSF-related metafield surfaced verbatim. Nothing hidden. If you spot data that looks wrong, let us know.
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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