“Zinc 30 mg per serving”
Evidence →The label promises 30 mg per serving. The panel says 30 mg. They match.
Exact product checked · GTIN 00669191640619ZHOU · checked Aug 9, 2026 · on sale since Feb 3, 2021Package says manufactured by: Zhou Nutrition® | Zhou, Inc. · Park City, UT 84098
Quick read · ZHOU
Zhou Zinc Defender
Checked against public sources on August 9, 2026 · LookCloser does not sell or recommend supplements.
60capsules
60servings per container
Does the marketing hold up?
Every ingredient shows its amount · 2 ingredients listed. Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
Is the dose real?✓Listing and panel agreeboth say 30 mg of Zinc
What a serving costs$0.19per serving, at the checked price
Is it tested?No testing claim made
Who’s behind it?No exact match in USPTO
Is it the real thing?✓Barcode matches outside records
Trouble on record?✓No recalls found
“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◖ partly confirmed1? couldn’t verifyno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Vitamin B-6 (as Pyridoxine HCl) | 20 mg |
|---|---|
| Zinc (from Zinc Monomethionine) | 30 mg |
Printed on the package: VEGAN · LAB VERIFIED · GMP · MADE WITH NON-GMO INGREDIENTS · NON-GMO · GLUTEN FREE
We read 2 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. 3 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed2
“GMP”
Evidence →“GMP-certified” describes factory processes, not what is in the bottle. The claim does not name a certifier or public register that a shopper can check.
“MINERAL SUPPORT - Zinc is an essential mineral that supports the activity of over 300”
Evidence →Ingredient evidence exists; on dose: label states 30 mg/serving — about 75% of the adult daily reference (adult RDA 8–11 mg; NIH sets 40 mg/day as the tolerable upper limit for adults). A single serving isn’t meant to supply a full day, so this is context, not a shortfall. Caveat: chelate and gluconate labels may state compound mass rather than elemental zinc.
Ingredient research can support context, but it is not a trial of this exact product.
?Couldn’t verify independently1
“IN THE USA WITH GLOBAL”
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.
Quick read · 2 useful findings
What is worth knowing.
Headlines first. Open evidence only when you want the source trail.
CheckedIs the label honest?
Every ingredient shows its amount · 2 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 · 669191640619.
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 “Zinc Defender” (variant: Default Title) — identity confirmed across retailer listings.
Locked evidence record →Open the full source-linked findingWhat remains open 3
- No FDA recall matched this brand in the current search.
- We have not found a public label filing for this exact product.
- No dated review-history series is on file yet.
These are evidence gaps, not strikes against the product.
Research behind the findings
Dose and research context
We could not match an amount on this product to a studied range for the same ingredient, so these links are ingredient background rather than a measurement of this product.
Background reading
What the research says about these amounts
Not a score. Studies disagree with each other and change over time, so this sits beside the evidence rather than counting toward it — it is here so you can read the sources yourself.
The panel lists 30 mg of zinc per serving. Studies we found used 8 mg–40 mg a day, so this sits inside that range.
0studied 8 mg–40 mg
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
Where it sells
Price check for this exact product
Brand website
Exact UPC/GTIN match$11.19
$0.19 per labeled serving
matching UPC/GTIN · checked Aug 9, 2026
View on Brand website ↗Amazon
Exact UPC/GTIN match$11.19
$0.19 per labeled serving
matching UPC/GTIN · checked Aug 9, 2026
View on Amazon ↗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 at the same price at check time.
The observed listing and exact brand page repeat 30 mg. 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 August 09, 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.