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LookCloser.aipublic supplement evidence
Exact product checked · GTIN 00807735011956Premier Research Labs · checked Jul 26, 2026 · on sale since Nov 6, 2020🇺🇸 USPTO wordmark owner · Premier Research Labs, LP · TEXAS, USA
Quick read · Premier Research Labs

Premier Research Labs Liquid Zinc Ultra Supplement

Checked against public sources on July 26, 2026 · LookCloser does not sell or recommend supplements.

Does the marketing hold up?

FDA recall appears in this brand's history. An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.

Is the dose real?Panel read — dose not verified1 ingredient listed; no advertised amount we could confirm against them
What a serving costs$0.66per serving, at the checked price
Is it tested?No testing claim made
Who’s behind it?🇺🇸Premier Research Labs, LPlimited partnership; limited liability company · TEXAS, USA
Is it the real thing?Barcode matches outside records
Trouble on record?Brand history — not this 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◖ partly confirmedno contradictions · brand-level recall on file
The label itself

What the Supplement Facts panel says

Serving size 1 Teaspoon (5mL) · 47 servings per container · 8 FL OZ (235 mL)

Zinc (Zinc Sulfate Heptahydrate)25 mg

Printed on the package: NON-GMO · Kosher Certified · U · FDA-Monitored CGMP Facility

We read only 1 line from this label. A Supplement Facts panel normally lists several more, so treat this as incomplete rather than as the whole label.

Marketing claims, checked

The checks, one by one

The public sources did not settle the marketing promises on this label.

Partly confirmed1

“Premier Research Labs Liquid Zinc Ultra Supplement - for Immune Support & Well-Being for Adults & Kids, Highly Absorbable Drops, Convenient & Easy…”

Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.

Evidence →

Ingredient research can support context, but it is not a trial of this exact product.

Quick read · 2 useful findings

What is worth knowing.

Headlines first. Open evidence only when you want the source trail.

Needs explanationAny trouble in public records?

FDA recall appears in this brand's history

An exact-product recall is a direct signal. A different product from the same firm is company context, not a strike against this item.

Evidence and sources

This recall is not about the product on this page. Premier Research Labs LLC recalled a different product on June 15, 2022. FDA has since closed that case. The recalled item was “AloePro Dietary Supplement Made With Organic ALOE VERA LIQUID 16 FL Oz.…”

Locked evidence record →Open the full source-linked finding
CheckedIs 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 finding
What remains open 2
  • We have not found a public label filing for this exact product.
  • Barcode checksum is valid; no independent product record was found.

These are evidence gaps, not strikes against the product.

Who owns the brand wordmark?
🇺🇸
Premier Research Labs, LPLimited Partnership; Limited Liability Company · exact supplement-class mark for PREMIER RESEARCH LABS
Registration4346054
Registered2013-06-04
AssignmentsYes

Filed address
Building B, 3500 Wadley Place, Austin, TEXAS 78728, UNITED STATES

USPTO identifies the public owner or applicant behind this brand wordmark. This does not by itself identify the product manufacturer or prove where the product was made. Open USPTO source ↗

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 25 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

Amazon

Exact UPC/GTIN match
$30.99

$0.66 per labeled serving

matching UPC/GTIN · checked Jul 26, 2026

View on Amazon ↗

iHerb

Not confirmed
No 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 confirmed
No 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 confirmed
No 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 ↗

Only one exact price was available at build time; prices change by date, seller, and promotion.

No official brand storefront is confirmed in this record. That is neutral, but it prevents a direct brand-price, label, review, and document check.

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.

Read / share full evidence →

Record built July 26, 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.