Checked against public sources on July 26, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
The observed listing says it is tested, but names no lab or certifier. A testing badge without an issuer or report is a marketing claim, not evidence. Ask for the lab name and lot-specific report.
“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.
The public sources did not settle the marketing promises on this label.
“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.
Ingredient research can support context, but it is not a trial of this exact product.
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.
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.
The barcode matches, so we are checking the right product rather than a look-alike.
The brand's store lists this exact barcode as “Nutricost Zinc Carnosine Capsules” (variant: Default Title) — identity confirmed across retailer listings.
Locked evidence record →Open the full source-linked findingComparing cost at a research-relevant amount shows how quickly the package is used and what the routine actually costs.
At 1.0 serving(s) a day to reach the low end of the studied range (8–40 mg), this product runs roughly $5 per month. A price observation, not a recommendation.
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 92 to 108 between March 5 and July 18, 2026. The largest rise inside any single 30-day window was about 6, 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
UTAH, USA) DBA Nutricost; 351 E 1750 N, VINEYARD, UTAH 84059, 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 ↗
The label amount is shown beside the range used in the linked ingredient studies.
18 mg per serving — within the 8–40 mg/day used in the linked studies.
$0.17 per labeled serving
matching UPC/GTIN · checked Jul 26, 2026
View on Amazon ↗$0.17 per labeled serving
matching UPC/GTIN · checked Jul 26, 2026
View on iHerb ↗$0.18 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 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 3 sellers. Amazon was lowest at $19.95; Brand website was highest at $21.97 — a $2.02 range at check time.
The observed listing and exact brand page repeat 86 mg, 120 capsules, 120 servings. 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 full report shows every source, the exact unresolved question, and the documentation that would settle it.
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.