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EGCG Green Tea Extract - Standardized
EGCG Green Tea Extract - Standardized
No reviews
No reviews
Regular price
$18.20 USD
Regular price
$36.39 USD
Sale price
$18.20 USD
Shipping calculated at checkout.
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The full picture
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 →
65/100
Standard
Six-dimension breakdown
Evidence
65
Formulation
68
Manufacturing
62
Safety
60
Transparency
68
Sustainability
55
Why this scored 65/100
EGCG (epigallocatechin gallate) at high doses has hepatotoxicity concerns (Hu 2018) — EFSA and USP recommend keeping to under 800 mg EGCG/day and avoiding on empty stomach. Green tea catechin RCTs for metabolic and cardiovascular endpoints (Hursel 2011 meta) show modest effects. Standardization is a formulation positive. Would move to Verified 70+ with per-serving EGCG mg, empty-stomach caution, and USP Green Tea Extract verification for hepatotoxin risk.
Last scored: Full 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 EGCG Green Tea Extract - Standardized?
EGCG Green Tea Extract - Standardized, categorized under Immune health & antioxidants 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 EGCG Green Tea Extract - Standardized score on the Vyvata rubric?
65/100 overall — Standard tier (50–69 band). Per-dimension breakdown: Formulation 68, Transparency 68, Evidence 65, Manufacturing 62, Safety 60, Sustainability 55. Scored as of 2026-08-24.
Why did EGCG Green Tea Extract - Standardized score in the Standard tier?
EGCG (epigallocatechin gallate) at high doses has hepatotoxicity concerns (Hu 2018) — EFSA and USP recommend keeping to under 800 mg EGCG/day and avoiding on empty stomach. Green tea catechin RCTs for metabolic and cardiovascular endpoints (Hursel 2011 meta) show modest effects. Standardization is a formulation positive. Would move to Verified 70+ with per-serving EGCG mg, empty-stomach caution, and USP Green Tea Extract verification for hepatotoxin risk.
What are the strongest and weakest aspects of this product?
Strongest: Formulation at 68/100 (dose adequacy, bioavailability form, and ingredient redundancy) and Transparency at 68/100 (dose disclosure vs proprietary blends, and honesty of marketing claims). Weakest: Safety at 60/100 (adverse-event profile, interaction risk, and dose ceiling) 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.
Is EGCG Green Tea Extract - Standardized 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 EGCG Green Tea Extract - Standardized to a higher tier?
Would move to Verified 70+ with per-serving EGCG mg, empty-stomach caution, and USP Green Tea Extract verification for hepatotoxin risk.
Are there higher-scoring alternatives to EGCG Green Tea Extract - Standardized?
The top-ranked immune health & antioxidants product in the Vyvata catalog is currently PreserVision AREDS 2 Eye Vitamins, 210 Soft gels at 77/100. See the full ranked list of 590 scored products in this subcategory at https://vyvata.com/pages/best-immune-health-and-antioxidants-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 EGCG Green Tea Extract - Standardized?
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=EGCG%20Green%20Tea%20Extract%20-%20Standardized),Google(https://www.google.com/search?q=EGCG%20Green%20Tea%20Extract%20-%20Standardized+reviews),Reddit(https://www.reddit.com/search/?q=EGCG%20Green%20Tea%20Extract%20-%20Standardized%20review),andTrustpilot(https://www.trustpilot.com/search?query=EGCG%20Green%20Tea%20Extract%20-%20Standardized).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
- 65 / 100
- Tier
- Standard
- Category
- Supplements
- Subcategory
- immune antioxidants
- Last scored
- Third-party certifications
- None on record at time of scoring
- Vendor
- Swanson Vitamins
- Tags
- Shopify Collective, Swanson Vitamins
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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