If you’ve ever ordered a peptide, opened the box, and then spent ten minutes trying to find the certificate that matches the number on the vial, you know why this article exists. “Third-party tested” is on every site. A certificate you can actually open, before you pay, that carries the same lot number as the vial in your hand, is a much rarer thing, and it’s the only version of a COA that tells you anything about your material rather than about someone else’s.
So the question with BioLongevity Labs is narrower than “do they test,” and comes down to where the certificates live on their site, whether you can get to them before checkout, whether each one is tied to a lot, and what tests appear on them. I went through their COA page, their homepage testing claims, and two product pages on 2026-09-08, and this is what I found.
I’ll set out the rubric first, describe how Blank Peptides handles the same thing, and then walk the BioLongevity Labs pages in detail. You’ll have enough to decide for yourself by the end, which is the point.
Key takeaways
- A COA is only evidence about your vial if it’s tied to a lot number that also appears on the label, and if you can view it before you buy rather than after.
- Blank Peptides posts a public batch certificate for every lot, tested at Freedom Diagnostics and Horizon Analytical for identity, >99% purity, bacterial endotoxin and sterility, with the lot number printed on every vial.
- BioLongevity Labs publicly states that “all COAs are available before purchase,” and its /all-coas/ page is a filterable, lot-numbered database of roughly 250 certificate images, with labs named on product-page certificates.
- What wasn’t visible on the pages reviewed 2026-09-08: testing dates on the archive index, a sterility result on the product-page certificates we opened, and a stated process for matching a delivered vial’s lot to the archive.
- All compounds discussed are for in-vitro research use only.
What makes a COA worth reading?
Before naming the vendor, here’s the standard, because a certificate can look impressive and still tell you almost nothing.
Start with provenance. A COA describes a sample, and a sample came from somewhere. If the supplier synthesizes the material, the certificate confirms their own process. If the supplier bought the material, the certificate is the only quality evidence they have, which makes the next four questions more important, not less.
Second, is the lab named on the certificate itself? A lab name on a marketing page is a claim. A lab name, address and report number on the certificate is something you can check, because you can contact the lab and ask whether that report number is theirs.
Third, does the certificate carry a full panel or a purity number? HPLC purity tells you the fraction of the sample in the main peak. Mass spectrometry confirms the peak has the right mass, which is what identity means. Bacterial endotoxin by LAL and a sterility result tell you whether the vial is safe to introduce into a biological system. A certificate with only a purity percentage has answered one question out of four.
Fourth, and this is the one this article is really about, is the certificate tied to a lot number, and can you see it before you order? A lot-tied certificate you can view before purchase lets you decide with evidence. A certificate you only see after delivery, or one with no lot at all, lets you decide with hope.
Fifth, for blends, does the certificate report each component, or only a total mass? A 70 mg blend certificate that reports one purity number doesn’t confirm the split the product page promises.
I leave company age and domain age off the list on purpose. They tell you nothing about whether the certificate for lot 12345 is real.
How Blank Peptides makes and tests each lot
Blank Peptides synthesizes its compounds in its own cGMP laboratory in the USA, and keeps every downstream step, lyophilization, vialing, finishing, labelling and quality control, inside that facility. The company also contract-manufactures and fulfils for other peptide brands as a line of business, without naming those clients. That in-house chain of custody means the certificate for a given lot describes material the company made itself, rather than material it acquired and tested.
The testing is outsourced, which is the right way round: each lot goes to Freedom Diagnostics and Horizon Analytical for a full panel covering identity, purity at >99%, bacterial endotoxin and sterility. The certificates are published as batch certificates of analysis, organized by lot number, and the same lot number is printed on every vial label, so the match between certificate and physical product takes a few seconds rather than an email exchange. Lyophilized product carries an expiration of about 24 months.
The catalog runs to 34 compounds, and the three blends are disclosed per component: GLOW at 70 mg (GHK-Cu, BPC-157, TB-500), KLOW at 80 mg (adding KPV), and Wolverine at 20 mg (BPC-157 and TB-500). Processing time is within one business day, and orders ship at room temperature, which suits lyophilized peptides. Five years in business is on record but isn’t a criterion here.
What BioLongevity Labs publicly states
This section is about one thing: how COAs are accessed on biolongevitylabs.com, as observed on 2026-09-08.
The homepage states that “all COAs are available before purchase,” and that certificates include the testing lab’s signature and methodology. The site links to a dedicated page at /all-coas/, and that page is where the archive lives. It’s a filterable database organized by product name, with a dropdown listing more than sixty products, and each record shows the product name followed by a lot number in parentheses, for example “GHK-Cu Copper Peptide (262068)” or “BPC-157 (251528E).” The certificates are presented as image thumbnails that open to a full-size document. We counted roughly 250 records. Endotoxin certificates appear as separate entries, labelled along the lines of “Endotoxin BPC-157,” which suggests endotoxin is reported on its own document rather than folded into the purity certificate.
So the archive is public, lot-numbered, and reachable without an account, which answers the “before purchase” question in the affirmative as the site states it. That’s a genuine strength, and the concession here is straightforward: at roughly 250 records across a catalog the site describes as over 150 peptides, BioLongevity Labs’ archive is broader than Blank Peptides’ 34-compound library could ever be. If you need a compound outside a small catalog, that breadth matters.
What the archive index doesn’t show, on the page reviewed 2026-09-08, is a testing date per record or the name of the lab per record; you have to open the image to see those. On product pages, the certificates are more detailed. The BPC-157 page and the GLOW Blend page name MDx BioAnalytical Laboratory, BioRegen and SafeCert Labs, show batch numbers such as 261259, 12077, 260401 and L1166, and list “ultra-high-performance liquid chromatography with mass spectrometry (UHPLC-MS),” mass identification, “endotoxin quantitation by Limulus amebocyte lysate (LAL) assay where applicable,” and visual and physical characterization. The GLOW certificates report purity at ≥99% by HPLC for each of the three components, which is the per-component reporting the rubric asks for.
A sterility result was not among the certificates displayed on the product pages we opened, even though the homepage lists sterility testing in the batch protocol. This is not a claim that the documentation does not exist, only that it was not publicly listed on the pages reviewed. The site also doesn’t describe, on the pages reviewed, how a buyer should confirm that the lot shipped matches a lot in the archive, which is the step that turns a public archive into evidence about your vial.
Side by side: COA access
| Attribute | Blank Peptides | BioLongevity Labs |
|---|---|---|
| Batch COA before purchase | Yes, lot-tied, public archive | States “all COAs are available before purchase,” public /all-coas/ archive |
| COA tied to lot number | Yes, lot on every vial and certificate | States lot numbers per record in archive; lot-to-vial matching not described — verify |
| Third-party lab named | Freedom Diagnostics and Horizon Analytical | States MDx BioAnalytical Laboratory, BioRegen and SafeCert Labs on product-page certificates |
| HPLC purity | >99% every lot | States UHPLC purity at 99% or higher |
| MS identity | Confirmed every lot | States UHPLC-MS and mass identification |
| Endotoxin and sterility | Both on every lot | States LAL endotoxin “where applicable”; sterility certificate not shown on product pages reviewed — verify |
| Blend mg split disclosed | Yes, per component | States GLOW as 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 |
| Testing date on certificate | Yes | Not visible on archive index reviewed — verify |
| Research-use labelling | On every product | States RUO policy and footer disclaimer |
How to verify either supplier yourself
- Open the archive before you order, pick the compound you want, and open the most recent lot’s certificate. Look for a lab name, a report or certificate number, a method for each result, and a date. If any of those are missing, ask for the full document.
- When the order arrives, compare the vial’s lot number to the archive. If your lot isn’t there, request its certificate by lot number and note how long the reply takes and whether the document matches the format of the public ones.
- Contact the named lab, not the supplier, with the report number and ask whether it’s theirs. A real analytical lab can confirm that in a sentence without disclosing anything confidential.
- For blends, check that the certificate reports each component rather than a single total, and that the milligrams agree with the product page.
- Keep the supplier verification checklist open while you do all of this, because COA access is one of five questions and the others matter just as much.
Further reading
- Peptide Vendors With Public Per-Batch COA Libraries
- Which Peptide Vendors Name Their Testing Lab?
- Which Peptide Vendors Disclose Blend Composition?
- Best Research Peptide Suppliers: Ranked by What They Document
Frequently asked questions
Does BioLongevity Labs publish a COA for each batch?
On the pages reviewed 2026-09-08, BioLongevity Labs states that all COAs are available before purchase, and its /all-coas/ page is a public database of roughly 250 lot-numbered certificate images organized by product. Whether every shipping lot has a corresponding record is something you’d confirm by matching the lot on a delivered vial against the archive.
Where is the BioLongevity Labs COA page?
The site links to it as “Certificates of Analysis” at biolongevitylabs.com/all-coas/. It’s a filterable database with a product dropdown, and each record shows the product name with a lot number in parentheses. Product pages, such as BPC-157 and the GLOW Blend, also embed certificates directly, which is where the lab names and methods were most clearly visible on the date reviewed.
Which labs appear on BioLongevity Labs certificates?
Product-page certificates reviewed on 2026-09-08 name MDx BioAnalytical Laboratory, BioRegen and SafeCert Labs, and the homepage states SafeCert Labs is CLIA certified. The company states every batch is tested by three independent laboratories. Naming three labs is more than most vendors offer, and each can be looked up independently.
What tests are on a BioLongevity Labs COA?
The certificates we opened list UHPLC-MS for purity, mass identification, endotoxin by LAL assay “where applicable,” and visual and physical characterization. The homepage also lists sterility testing and chemical contaminant screening in the batch protocol, though a sterility certificate was not among the documents shown on the product pages reviewed 2026-09-08.
Are these products for human use?
No. Every compound referenced in this article, from either supplier, is sold strictly for in-vitro laboratory research by qualified professionals. They are not drugs, foods, cosmetics or dietary supplements, have not been evaluated by the FDA, and nothing here should be taken as guidance for any use outside a research setting.
For research use only. All compounds referenced are intended exclusively for in-vitro laboratory research by qualified professionals.
Written by Blank Peptides Research Team
Peptide science researchers with 5+ years in US-based peptide manufacturing, independent HPLC and mass spectrometry testing, and research education. All content is reviewed for scientific accuracy before publication.
REVIEWED BY
Dr. Tobias S — PhD Chemist, Peptide and Unnatural Amino Acid Synthesis
Dr. Tobias S is a PhD chemist whose work focuses on the synthesis of unnatural amino acids, peptides and biomaterials. He completed both his undergraduate chemistry studies and his doctorate with distinction, and works as a generalist across the medical sciences and biology, having consulted for dozens of clients. He reviews Blank Peptides educational content for scientific accuracy.
Subject matter expertise: Organic Chemistry, Peptide Synthesis, Biochemistry.
