“Zinc 25 mg per serving”
Evidence →The label promises 25 mg per serving. The panel says 25 mg. They match.
Exact product checked · barcode not publishedQuantum Nutrition · checked Jul 31, 2026 · on sale since May 1, 2020Package says manufactured for: QUANTUM NUTRITION LABS, LP · 3500-B WADLEY PLACE, AUSTIN, TX 78728
Quick read · Quantum Nutrition
Quantum Nutrition Labs Liquid Zinc Supplement…
Checked against public sources on July 31, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Listing claim matches the Supplement Facts panel. The label promise and the Supplement Facts amount agree.
Is the dose real?✓Listing and panel agreeboth say 25 mg of Zinc
What a serving costsNo price found for this exact barcode
Is it tested?No testing claim made
Who’s behind it?No exact match in USPTO
Is it the real thing?No barcode publishedso it can’t be matched against certification, recall or other retailer 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 out1◖ partly confirmedno contradictions · no recalls
The label itself
What the Supplement Facts panel says
| Zinc (Zinc Sulfate Heptahydrate) | 25 mg |
|---|
Printed on the package: PURE VEGAN · PURITY VERIFIED · POTENCY VERIFIED · NON GMO · SOY FREE · U · OU Kosher Certified · cGMP
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. 1 could not be fully confirmed from public sources.
✓Matches the label1
◐Partly confirmed1
“Quantum Nutrition Labs Liquid Zinc Supplement Drops - Zinc Sulfate Tincture for Adults, 25mg per Serving, Metabolic Function & Immune Support - 8…”
Evidence →Ingredient evidence exists; on dose: label states 25 mg/serving — about 62% 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.
Marketing language, not scored
Manufactured in a cGMP compliant facility for superior quality assurance · Superior immune support*
Quick read · 2 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 25 mg; the photo-read Supplement Facts panel shows Zinc (Zinc Sulfate Heptahydrate) at 25 mg 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 findingWhat remains open 3
- No FDA recall matched this brand in the current search.
- 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.
Research behind the findings
Dose and research context
The label amount is shown beside the range used in the linked ingredient studies.
Dose vs research
Zinc
STUDIED RANGE050 mg
25 mg per serving — within the 8–40 mg/day used in the linked studies.
Linked ingredient research · label amount, not a recommendation
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.
Buying options
Where you can check or buy it
Only the submitted seller page is identity-certain. Other destinations are shown as leads until a shared UPC/GTIN confirms the exact product.
Amazon
Submitted listing$30.99
Lowest New observed via Keepa on 2026-08-01.
View on Amazon ↗iHerb
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search iHerb ↗Target
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Target ↗Walmart
Not confirmedNo price confirmed
No matching product page was confirmed in the current record. Search results cannot be attached as this product until the UPC/GTIN matches.
Search Walmart ↗Prices and stock are point-in-time observations. Related pages are never used as product evidence. No affiliate links; LookCloser earns nothing from these sellers.
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 02, 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.