“Quercetin 1,000 mg per serving”
Evidence →The label promises 1,000 mg per serving. The panel says 1,000 mg. They match.
Exact product checked · GTIN 00850011900154DEAL SUPPLEMENT · checked Jul 22, 2026 · on sale since Sep 13, 2019Package says manufactured for: Arena Nutrition, Inc. · 1249 S Diamond Bar Blvd, Diamond Bar, CA 91765
Quick read · DEAL SUPPLEMENT
Deal Supplement Quercetin 1
Checked against public sources between July 22 and July 24, 2026 · LookCloser does not sell or recommend supplements.
300capsules · 100 servings
Does the marketing hold up?
Testing claimed — documentation not found. The observed listing and the exact brand product page both claim third-party testing. Neither names the laboratory or links a product- or lot-specific report. …
Is the dose real?✓Listing and panel agreeboth say 1,000 mg of Quercetin
What a serving costs$0.22per serving, at the checked price
Is it tested?Claimed — no lab or certificate found
Who’s behind it?No exact match in USPTO
Is it the real thing?✓Barcode matches outside records
Trouble on record?Recall check not run yeta gap in our records, not a finding about the product
“Couldn’t verify” means we looked and found no public proof — not a mark against the product. Most supplement claims cannot be independently verified by anyone, so grey is the normal state of this industry.
1✓ checked out2? couldn’t verifyno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Quercetin (as Quercetin Dihydrate) | 1,000 mg |
|---|
Printed on the package: GMO FREE · SOY FREE · GLUTEN FREE · LAB TESTED · DAIRY FREE
We read 1 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
Marketing claims, checked
The checks, one by one
1 promise checks out. 2 could not be fully confirmed from public sources.
✓Matches the label1
?Couldn’t verify independently2
“Ensured - 3rd party lab tested and passed, Non-GMO”
Evidence →No named laboratory or lot-specific certificate was found for this exact product. The exact brand page repeats a testing claim but names no issuer. NSF, IFOS, USP, and Informed-Sport were not checked in this record. This is a public-evidence limit, not a finding that testing did not occur.
“in the USA without gluten, dairy, eggs, peanuts, soy, wheat, &”
Evidence →“Made in USA” can describe only final bottling. Ingredient-sourcing records were not located for this product.
We looked and found no public proof. That does not count against the product.
Marketing language, not scored
Extra Strength · Powerful Immune System Antioxidant
Quick read · 3 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
CheckedIs the label honest?
Listing claim matches the Supplement Facts panel
The label promise and the Supplement Facts amount agree.
Evidence and sources
The listing claims 1 g; the photo-read Supplement Facts panel shows Quercetin (as Quercetin Dihydrate) at 1 g per serving — the listing text and its photo-read panel agree; this is internal consistency, not independent testing.
Locked evidence record →Open the full source-linked findingCheckedIs the label honest?
Every ingredient shows its amount · 1 ingredients listed.
Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
Evidence and sources
The panel gives a per-ingredient amount rather than hiding quantities inside a proprietary blend, so each one can be compared to published research.
Locked evidence record →Open the full source-linked findingCheckedWho is behind it?
The barcode identity checks out · 850011900154.
The barcode matches, so we are checking the right product rather than a look-alike.
Evidence and sources
The brand's store lists this exact barcode as “Quercetin 1,000mg Per Serving, 300 Capsules” (variant: Default Title) — identity confirmed across retailer listings.
Locked evidence record →Open the full source-linked findingWhat remains open 3
- We have not found a public label filing for this exact product.
- No dated review-history series is on file yet.
- Brand ownership is not settled in this record.
These are evidence gaps, not strikes against the product.
Where it sells
Price check for this exact product
Amazon
Exact UPC/GTIN match$21.99
$0.22 per labeled serving
matching UPC/GTIN · checked Sep 2, 2026
View on Amazon ↗Brand website
Exact UPC/GTIN match$25.95
$0.26 per labeled serving
matching UPC/GTIN · checked Jul 22, 2026
View on Brand website ↗iHerb
Not confirmedNo exact listing saved
We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search iHerb ↗Target
Not confirmedNo exact listing saved
We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗Walmart
Not confirmedNo exact listing saved
We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Walmart ↗Same UPC/GTIN observed across 2 sellers. Amazon was lowest at $21.99; Brand website was highest at $25.95 — a $3.96 range at check time.
The observed listing and exact brand page repeat 1,000 mg, 300 capsules. That confirms cross-page consistency of the published claim, not the product contents.
Reference prices only · no affiliate links · every compared seller must publish the matching UPC/GTIN.
Want to inspect the evidence?
The full report shows every source, the exact unresolved question, and the documentation that would settle it.
Record built September 03, 2026. Sources: source listing observed at check time · USPTO Trademark Search · Keepa exact-listing history · NIH / published research · certification and regulator records where available. LookCloser publishes evidence and gaps; it does not advise for or against any supplement. Evidence-based corrections welcome.