Two sites, two very different ways of sounding rigorous. One of them names its testing laboratories on the about page and stops short of claiming it makes anything. The other opens with a statement that it manufactures all its compounds and that every batch goes through three separate laboratories, then leaves you to work out from the certificates and the FAQ what those laboratories are called. Both approaches will feel convincing on a first read, and both leave a specific row of the ledger empty, which is why it pays to fix the ledger before opening either tab.
I write for a peptide manufacturer, and neither company below is that manufacturer, so nothing here bends toward one or the other. What follows is five questions asked of both sites in identical wording, with answers quoted from their own pages and every unanswered row logged as a gap in what has been published rather than as a claim about what happens off-page.
The observations come from sportstechnologylabs.com and biolongevitylabs.com as they stood on 2026-09-08. Companies rewrite about pages and add certificates, so treat that date as part of every finding rather than as a legal flourish at the end.
Key takeaways
- The five rows worth comparing are who synthesized the lot, which laboratory tested it, how wide the panel ran, whether a certificate opens before payment and carries a lot number, and whether blends print per-component milligrams.
- Sports Technology Labs publicly names MZ Biolabs in Tucson, Arizona and Colmaric Analyticals, LLC on its about page, and states “HPLC purity analysis and molecular weight confirmation via Mass Spectrometry.”
- BioLongevity Labs publicly states it “manufactures all compounds in U.S.-based GMP-certified facilities” and that “every compound we produce is tested by three independent certified laboratories,” with certificates available before purchase.
- BioLongevity Labs uses inconsistent ownership language across two of its own pages, and sterility results were not listed in either company’s stated panel on the pages reviewed 2026-09-08.
- Everything referenced here is research material for in-vitro laboratory work by qualified professionals, and none of it is guidance for use in people or animals.
What should decide between two vendors that both sound careful?
The rubric goes down before either name, because a standard written after reading the sites is a standard shaped by whichever one wrote its homepage better.
Provenance leads. Does the company state that it makes the material, that it works with partners who make it, or that it supplies material somebody else made? Read the verbs literally and read them across the whole site rather than on one page, because ownership language that shifts between the about page and the homepage is a signal in its own right.
Second, is the laboratory named? A count is not a name. “Three independent certified laboratories” tells you how many parties were involved without telling you which ones, and only a name lets you confirm the report yourself. A name that surfaces on a certificate or in an FAQ still counts, though it asks the reader to hunt for what the main copy could have stated plainly.
Third, how wide is the panel? HPLC purity reports what fraction of the material is a single species. Mass spectrometry, or LC-MS, confirms that species is the sequence on the label. Bacterial endotoxin and sterility describe the finished vial rather than the powder, and they are separate assays run by separate methods, so a panel covering three of the four is doing better than most while still leaving a question open.
Fourth, access and linkage. Can you open a batch certificate before paying, and does the lot number on it match the vial that arrives? Access on its own shows you the company’s general standard, and linkage on its own asks you to buy before you read. Both together are what make a document evidence about your material.
Fifth, blend disclosure. A blend priced by total milligrams with no per-component split cannot be written into a methods section, so the split separates a citable product from a decorative one. Company age and domain age stay out of the list, since neither describes a lot.
Where this standard comes from
These five checks are the ones Blank Peptides publishes its own lots against, as batch certificates of analysis posted per lot. Neither company in this comparison is that one. Naming the origin of a yardstick before applying it to two other businesses is the honest move, since a measurement is only worth something if whoever holds the ruler would accept being measured by it.
What Sports Technology Labs and BioLongevity Labs publicly state
Sports Technology Labs sells at sportstechnologylabs.com and ships its own inventory. On provenance, the homepage states products are “Bottled in the USA,” and the about page describes a supplier “proudly based in the United States” at a stated Shelton, Connecticut address, referring to “USP-Grade Solvents” and “Medical-Grade Glass.” The BPC-157 page states the peptide is “produced synthetically for laboratory use” and “packaged in America.” A statement that the company performs the synthesis itself, or naming the party that does, was not listed on the pages reviewed 2026-09-08, and the wording stayed consistent across the pages I read rather than claiming more in one place than another.
On testing, the about page states MZ Biolabs in Tucson, Arizona, described as a DEA-licensed facility, performs “HPLC purity analysis and molecular weight confirmation via Mass Spectrometry,” and names Colmaric Analyticals, LLC for “ISO-accredited methodologies.” Purity is stated as “our SARMs are minimum 98% pure, and our Peptides are minimum 96-99% pure,” with the BPC-157 page stating “Batch-tested to 99.43% (HPLC); minimum 98%.” The public certificate page lists product names, test dates and purity figures without an account, running January 2025 to June 2026 across roughly 18 peptide entries and 12 SARM entries, though lot numbers were not visible on that index. Bacterial endotoxin and sterility results were not listed on the pages reviewed 2026-09-08. Stacks ship as separate vials with amounts stated, the Glow Stack listing 5 mg BPC-157, 5 mg TB-500 and 50 mg GHK-Cu. Its commercial terms are the easier of the two to meet, stated as 68 listings, free US shipping over $149, dispatch “within one business day,” and a 60-day exchange on unused items.
BioLongevity Labs sells at biolongevitylabs.com. On provenance, the about page states “BioLongevity Labs is a U.S.-based manufacturer of research-grade peptides and bioregulators” and that the company “manufactures all compounds in U.S.-based GMP-certified facilities,” while the homepage describes working through “qualified partners that adhere to cGMP-aligned quality practices.” Those two statements point in different directions, and no facility was named on either page reviewed 2026-09-08, so the ownership row needs settling with the company rather than off the site.
On testing, the site states “every compound we produce is tested by three independent certified laboratories” and that it “independently verifies every batch through three separate certified laboratories,” with “99%+ purity, independently confirmed, no exceptions.” Methods are listed as “HPLC for purity verification, LC-MS for molecular identity confirmation, Chemical contaminant screening.” The main copy describes the laboratories by count, though the FAQ names SafeCert Labs and the GLOW product page shows certificates attributed to MDx BioAnalytical Laboratory, BioRegen and SafeCert Labs, with lot numbers including 261259 and 260401. Sterility was not listed in the stated panel, while endotoxin quantitation did appear on certificates reviewed. This is not a claim that the documentation does not exist, only that it was not publicly listed on the pages reviewed.
The concession belongs to its blends and its certificate access. The site states “Certificates of Analysis from all three independent labs are available for review before purchase,” and it prints per-component milligram splits across the blend range, listing GLOW as 70 mg made of 50 mg GHK-Cu, 10 mg BPC-157 and 10 mg TB-500, with comparable splits for its KLOW, Regeno, mitochondrial and Tesamorelin blends. That is the disclosure level a blend needs before it can appear in a methods section at all, and three named laboratories on lot-numbered documents is more attribution than most of this market provides. Catalog pages stated “Showing all 51 results,” shipping is stated as same-day dispatch before 12 PM PT with free domestic shipping over $400, and products are stated to be “Research Use Only” and not for human or veterinary use.
Side by side: manufacturing language and how many laboratories get named
| Attribute | Sports Technology Labs | BioLongevity Labs |
|---|---|---|
| Synthesises in-house | States products are “Bottled in the USA” and “packaged in America”; who synthesises not stated — verify | States it “manufactures all compounds in U.S.-based GMP-certified facilities”; homepage also cites “qualified partners”, facility not named — verify |
| Third-party lab named | States MZ Biolabs (Tucson, AZ) and Colmaric Analyticals, LLC on the about page, with batch results attributed to MZ Biolabs — verify | States “three independent certified laboratories”; FAQ and certificates name SafeCert Labs, MDx BioAnalytical Laboratory and BioRegen — verify |
| HPLC purity | States peptides are “minimum 96-99% pure” and a batch figure of “99.43% (HPLC)” — verify | States “99%+ purity, independently confirmed” with HPLC used for purity verification — verify |
| MS identity | States “molecular weight confirmation via Mass Spectrometry” at MZ Biolabs — verify | States LC-MS for molecular identity confirmation on every compound — verify |
| Endotoxin and sterility | Not listed on pages reviewed 2026-09-08 — verify | States endotoxin quantitation on certificates reviewed; sterility not listed — verify |
| Batch COA before purchase | States a public COA page with test dates and purity figures; lot numbers not visible on the index — verify | States COAs from all three labs “are available for review before purchase”, with lot numbers shown — verify |
| Blend mg split disclosed | States per-vial amounts for separate-vial stacks, such as 5 mg, 5 mg and 50 mg for Glow — verify | States splits across the blend range, including GLOW as “50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500” — verify |
| Catalog size | States 68 listings across liquid SARMs, SARM powders, peptides and stacks — verify | States “Showing all 51 results” across peptides and bioregulators — verify |
| Research-use labelling | States products are “for research purposes only and are not for human consumption” — verify | States products are “Research Use Only” and not for human or veterinary use — verify |
The interesting split is between what each site claims and where it claims it. BioLongevity Labs fills more documentation rows, with lot-numbered certificates and blend splits on its own pages, while its ownership language moves between two pages. Sports Technology Labs claims less about manufacturing and keeps that wording steady, and it names its laboratories in the main copy rather than leaving them to be found on a PDF.
How to verify either supplier yourself
- Ask about the ownership language first where a site claims manufacturing on one page and partners on another, and ask for the name of the facility rather than the certification standard it holds.
- Take every laboratory name you can find, from the about page, the FAQ or the certificate itself, and contact those laboratories to confirm the report numbers belong to them.
- Work from the page for the exact compound and vial size you would order, noting the lot number before you pay, then check it against the label when the box arrives.
- Ask both companies about sterility, since neither listed a sterility result in its stated panel on the pages reviewed 2026-09-08, and ask Sports Technology Labs about endotoxin as well.
- Grade both against the supplier verification checklist so each one gets answered on identical rows.
Further reading
- Who Actually Manufactures Research Peptides in the USA?
- Which Peptide Vendors Name Their Testing Lab?
- Which Peptide Vendors Disclose Blend Composition?
- Peptide Vendors With Public Per-Batch COA Libraries
Frequently asked questions
Sports Technology Labs vs BioLongevity Labs: which documents more?
BioLongevity Labs fills more rows, stating three independent laboratories, LC-MS identity, endotoxin quantitation on certificates, lot numbers, and per-component blend milligrams. Sports Technology Labs names its two laboratories in the main copy and keeps its manufacturing wording consistent, which BioLongevity Labs does not do across the two pages reviewed 2026-09-08.
Does BioLongevity Labs name its testing laboratories?
Partly. The main copy describes them by count as “three independent certified laboratories,” while the FAQ names SafeCert Labs and the GLOW product page shows certificates attributed to MDx BioAnalytical Laboratory, BioRegen and SafeCert Labs. The names exist on the site, though the reader has to go and find them rather than read them in the testing copy.
Why does the manufacturing language matter here?
Because BioLongevity Labs states on its about page that it manufactures all compounds in GMP-certified facilities, while its homepage describes working through qualified partners, and no facility is named on either. Those statements answer the provenance question differently, so it is worth asking the company which one describes the lot you would receive.
Which one discloses blend composition per component?
Both, in different formats. BioLongevity Labs prints splits across its blend range, listing GLOW as 50 mg GHK-Cu, 10 mg BPC-157 and 10 mg TB-500 in a 70 mg vial. Sports Technology Labs ships stacks as separate vials with amounts stated per vial, listing 5 mg BPC-157, 5 mg TB-500 and 50 mg GHK-Cu for its Glow Stack.
Are these products for human use?
No. Everything referenced here is research material intended for in-vitro laboratory work by qualified professionals. Purity percentages, laboratory names and certificate libraries describe documentation and nothing else. Nothing in this article is dosing guidance, medical advice, or a recommendation to use any compound outside a controlled laboratory 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.
