Checked against public sources on July 26, 2026 · LookCloser does not sell or recommend supplements.
Does the marketing hold up?
The label shows a visible consistency problem Check this exact wording or duplicate row on the package before relying on the printed amount.
“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 promise needs a closer look.
Published research exists for ingredients in this formula — see Related research below. 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. No exact brand product page was available for a document check. Under NSF/ANSI 173, NSF lists Thorne® products, including Thorne® L-Glutamine Powder, but not this exact SKU. 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.
Check this exact wording or duplicate row on the package before relying on the printed amount.
The label visibly shows: “Vitamin C (As Ascorbic Acid) appears more than once”; “Vitamin E (As D-Alpha Tocopheryl Acid Succinate) appears more than once”; “Vitamin K (100 Mcg As Vitamin K1 And 100 Mcg As Vitamin K2 As Mk-4) appears more than once”; “Biotin appears more than once”…
Locked evidence record →Open the full source-linked findingThese are evidence gaps, not strikes against the product.
Filed address
25820 Highway 2 West, Sandpoint, IDAHO 83864, 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.
$2.53 per labeled serving
matching UPC/GTIN · checked Jul 26, 2026
View on Amazon ↗$2.53 per labeled serving
matching UPC/GTIN · checked Jul 25, 2026
View on iHerb ↗Search results remain not linked to this exact product until this retailer publishes the matching UPC/GTIN.
Search Target ↗Search results remain not linked to this exact product until this retailer publishes the matching UPC/GTIN.
Search Walmart ↗Same UPC/GTIN observed across 2 sellers at the same price at check time.
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.