Checked against public sources on July 26, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
Every ingredient shows its amount · 8 ingredients listed. Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
“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.
| Calories | 10 |
|---|---|
| Total Carbohydrate | 0 g |
| Total Sugars | 0 g |
| Protein | 2 g |
| Biotin | 5000 mcg |
| Calcium | 3 mg |
| Sodium | 15 mg |
| Verisol Bioactive Collagen Peptides | 2500 mg |
Printed on the package: GLUTEN FREE · NON-GMO · SUGAR FREE · VERISOL collagen · Dairy Free · Non GMO · 3rd Party Tested
We read 8 lines from the package photograph. It is our transcript of the label, not the manufacturer’s panel, and it may be incomplete.
1 promise needs a closer look.
Published research exists for ingredients in this formula. Whether this product’s doses match those studies could not be confirmed.
Ingredient research can support context, but it is not a trial of this exact product.
We found no named, citable study of this product or formula. The claim may rest on ingredient research rather than a trial of this product.
No named laboratory or lot-specific certificate was found for this exact product. The exact brand page names no testing issuer and links no product-bound report. 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.
We looked and found no public proof. That does not count against the product.
Headlines first. Open evidence only when you want the source trail.
Every ingredient shows its real amount — nothing is hidden in a proprietary blend.
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 findingThe barcode matches, so we are checking the right product rather than a look-alike.
The brand's store lists this exact barcode as “Zena Liquid Collagen + Biotin” (variant: 60 Servings) — identity confirmed across retailer listings.
Locked evidence record →Open the full source-linked findingA count that moves steadily is ordinary. A sudden burst is what deserves a closer look.
Written reviews rose from 363 to 663 between June 30, 2025 and July 16, 2026. The largest rise inside any single 30-day window was about 39, so the count moved in steps rather than in one burst.
Locked evidence record →Open the full source-linked findingThese are evidence gaps, not strikes against the product.
Filed address
411 E. Bonneville Ave., Suite 400, Las Vegas, Nevada 89101, 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 ↗
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.
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 2.5 g of collagen peptides per serving. Studies we found used 2.5 g–15 g a day, so this sits inside that range.
Study ranges differ between trials and change as research changes. This is background reading, not a pass, a failure, or a recommendation.
$1.17 per labeled serving
matching UPC/GTIN · checked Jul 27, 2026
View on Amazon ↗$1.87 per labeled serving
matching UPC/GTIN · checked Jul 26, 2026
View on Brand website ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search iHerb ↗We only show a price when the seller publishes the same barcode as the bottle. We haven’t found that match here.
Search Target ↗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 $34.99; Brand website was highest at $56.00 — a $21.01 range at check time.
The observed listing and exact brand page repeat 5000 mcg. 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.
The summary stops at product-specific facts. The full report preserves every source, calculation, limitation, and unresolved check for review or sharing.
Record built July 27, 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.