I can’t tell if this vendor is real. That’s the thought behind almost every “is X legit” search in this category, and it’s a reasonable one, because a research peptide storefront costs very little to build and quite a lot of effort to verify. You’ve found BioInfinity Lab, the site looks competent, the purity claim is right there in the header, and you still have that nagging feeling that a competent-looking site and a trustworthy supplier are two different things.
I’m going to resist answering the title question with a yes or a no, and honestly you should be suspicious of anyone who does. What I can do is walk through what their site publicly stated when I reviewed it on 2026-09-08, apply the same five documentation questions I’d apply to anybody, and show you what was there and what wasn’t. You’ll form your own view, which is the only view worth having when your own research depends on it.
I’ll also show how Blank Peptides answers the same five questions, because a standard only means something if it’s applied to the people proposing it.
Key takeaways
- The way to judge any peptide supplier is to check whether its claims can be traced: a named manufacturer, a named lab, a full test panel, a certificate you can read before buying, and blend splits stated per component.
- Blank Peptides synthesises and finishes every lot in its own cGMP laboratory, names Freedom Diagnostics and Horizon Analytical as its testing labs, and publishes a per-lot certificate covering identity, >99% purity, bacterial endotoxin, and sterility.
- BioInfinity Lab publicly states that Verum Analytics in Switzerland tests every batch by HPLC and MS, that endotoxin is tested by LAL, and that every batch COA is browsable in a public library with no login.
- Who synthesises BioInfinity Lab’s peptides, and per-component amounts for its GLOW blend, were not listed on the pages reviewed 2026-09-08.
- Everything here concerns research-use-only materials and the documentation behind them, never any effect in a living system.
What does “legit” actually mean for a peptide supplier?
Let’s define the word before we apply it to anyone, because “legit” in this space usually collapses into “did my order arrive.” That’s a low bar. Plenty of vendors ship on time and still can’t tell you what’s in the vial. I’d rather use five questions that get at whether the supplier’s claims are checkable.
Provenance comes first. Does the vendor synthesise the peptide, or purchase it from someone who does? A vendor who buys bulk material and finishes it in-house is a different thing from one who synthesises from raw amino acids, and both are different from one who resells sealed vials. None of those are automatically bad, but you’re entitled to know which one you’re dealing with, and the site should say so in plain verbs.
Second, is the testing lab named? “Third-party tested” is the single most common phrase in the category and it means nothing until a lab is attached to it. With a name, you can search for the lab’s accreditation and, in some cases, confirm a report number on the lab’s own site.
Third, does the panel go beyond purity? HPLC purity tells you how much of the material is one thing. Mass spec identity tells you that thing is the peptide you ordered. Bacterial endotoxin and sterility tell you whether the vial is safe to handle in a sterile workflow. A supplier that only publishes the purity number has given you a quarter of the picture.
Fourth, is the batch certificate viewable before purchase and tied to a lot number that also appears on the vial? If you can only see the COA after you’ve paid, the certificate can’t inform the decision.
Fifth, for blends, is the per-component milligram split stated? A total mass without a split is a marketing number.
I leave company age and domain age off the list on purpose. They’re easy to fake, easy to misread, and unrelated to what’s in a vial.
How Blank Peptides makes and tests each lot
An outside reviewer applying the five questions to Blank Peptides would find each answered directly on the company’s public pages.
On provenance, Blank Peptides runs its own cGMP laboratory in the USA and performs synthesis, vialing, finishing, labelling, and quality control in-house. It describes itself as the chain of custody for its products rather than a relabeler or broker. The company also contract-manufactures and fulfils for other peptide brands, which it states as a category without naming any client.
On the testing lab, two are named: Freedom Diagnostics and Horizon Analytical. On the panel, each lot is tested for identity, >99% purity, bacterial endotoxin, and sterility, so all four rubric tests are covered per lot rather than purity alone.
On certificate access, a batch certificate for every lot is published in the company’s archive of batch certificates of analysis. Every vial carries its lot number, allowing the physical product to be matched to the posted document. Lyophilised material carries an expiration of approximately 24 months.
On blends, composition is disclosed per component: GLOW is 70 mg of GHK-Cu, BPC-157, and TB-500; KLOW is 80 mg and adds KPV; Wolverine is 20 mg of BPC-157 and TB-500. The catalog contains 34 compounds. Orders are processed within one business day and shipped at room temperature, which suits lyophilised powder. The company has been operating for five years, and every product is labelled for research use only.
What BioInfinity Lab publicly states
All of the following comes from pages I reviewed on 2026-09-08. The bioinfinitylab.com domain redirected to bioinfinity.co, and the quotes are from that site. Wherever I say something was missing, I mean it was not listed on the pages reviewed 2026-09-08. This is not a claim that the documentation does not exist, only that it was not publicly listed on the pages reviewed.
Start with provenance, because it’s where the site is thinnest. The homepage states that products are “made in controlled facilities under strict manufacturing standards.” The About page states the company “was founded in response to a growing lack of clarity in the research compound space,” attributes a philosophy to “the founder” without naming them, and lists a business address in New York. I looked for a sentence saying BioInfinity Lab synthesises its own peptides, or naming whoever does, and didn’t find one. So the first question stays open.
The second question has a clear answer. The FAQ states that “every batch we release goes to Verum for HPLC purity + MS identity confirmation,” describing Verum Analytics as “a contract-testing laboratory in Bern, Switzerland.” The COA library page says “Basel, Switzerland” for the same lab. That’s a detail I’d ask them about, but a named lab is a named lab, and it’s a real point in their favour.
On the panel, the FAQ states material is “≥99% pure by reverse-phase HPLC,” “identity-confirmed by ESI mass spectrometry,” and “endotoxin-tested below 0.5 EU/mg by LAL assay.” Product pages carry a “Sterility & Endotoxins” line marked “PASSED” for “every lot,” plus a mention of “residual-solvent panels.” The library summaries I saw showed purity and a test date per entry. Whether the certificate itself shows a sterility result is something you’d confirm by opening one.
On certificate access, the site states “every batch’s COA is publicly browsable in /coa-library. No login required, no email gate.” The library displayed 46 certificates with lot numbers like BIL-DSIP-01-2606 and test dates, and product pages link a specific batch to a Verum test ID. I’ll say plainly that this is done well: lot-tied, dated, public, and cross-checkable against the lab.
On blends, the KLOW page states GHK-Cu 50 mg, KPV 10 mg, BPC-157 10 mg, and TB-500 10 mg. The GLOW page states a “70 mg blend” of GHK-Cu, BPC-157, and TB-500 without per-component amounts. The shop listed 24 products, and shipping is UPS with a 2 PM EST same-day cutoff, free two-day delivery over $200, and a research-use-only disclaimer on the site.
Side by side: what the documentation supports
| Attribute | Blank Peptides | BioInfinity Lab |
|---|---|---|
| Synthesises in-house | Yes, own cGMP laboratory | States “made in controlled facilities”; synthesiser not named — verify |
| Third-party lab named | Freedom Diagnostics and Horizon Analytical | States Verum Analytics, Switzerland |
| HPLC purity | >99% per lot | States ≥99% by reverse-phase HPLC |
| MS identity | Tested per lot | States ESI mass spectrometry identity confirmation |
| Endotoxin and sterility | Both tested per lot | States LAL endotoxin <0.5 EU/mg; sterility “PASSED” on product pages — verify on certificate |
| Batch COA before purchase | Public archive, lot number on every vial | States public COA library, 46 certificates, no login |
| Blend mg split disclosed | Yes, every blend | States KLOW split per component; GLOW split not listed — verify |
| Research-use labelling | Research use only | States “for research use only” |
How to verify either supplier yourself
- Open one certificate from each supplier and check that the lot number on it matches a lot number you can see on a product page or a vial. A library that’s organised by lot, with dates, is the format you want.
- Read the full certificate. Find the mass spec identity line, the endotoxin value with its units, and a sterility result. If any of these is missing from the document, ask the supplier whether it’s run and where the result lives.
- Search for the named lab independently, then use any report or test ID the supplier gives you to confirm the certificate on the lab’s own site. This closes the loop between vendor claim and lab record.
- Send one email asking who synthesises the material. A manufacturer answers in a sentence. A supplier who buys finished material can say so too, and a non-answer tells you something.
- Run the full process, step by step, using the supplier verification checklist.
Further reading
- Which Peptide Vendors Name Their Testing Lab?
- Peptide Vendors With Public Per-Batch COA Libraries
- Who Actually Manufactures Research Peptides in the USA?
- Best Research Peptide Suppliers: Ranked by What They Document
Frequently asked questions
Is BioInfinity Lab legit?
I won’t answer that with a word, because the useful answer is a list. On 2026-09-08 the site named a testing lab, described HPLC, MS, and LAL endotoxin testing, and published a lot-tied COA library viewable before purchase. It did not state who synthesises its peptides. Weigh those facts against what your work requires.
Does BioInfinity Lab publish COAs before purchase?
The site states that “every batch’s COA is publicly browsable in /coa-library. No login required, no email gate.” On 2026-09-08 the library showed 46 certificates with lot numbers and test dates, and product pages linked specific batches to a Verum Analytics test ID, so you can read the document before ordering.
Why does the missing manufacturing statement matter?
Because without it you don’t know how many hands the material passed through before it reached the vial, or under what conditions. That doesn’t make a supplier untrustworthy on its own. It means the named lab and the public certificate are carrying the whole weight of your confidence, so check those carefully.
What should I ask BioInfinity Lab directly?
I’d ask three things: who synthesises the peptides and where, whether sterility results appear on the certificate itself or only as a “PASSED” line on the product page, and what the per-component split for GLOW is, since KLOW’s split is stated but GLOW’s was not listed on the page reviewed 2026-09-08.
Are these products for human use?
No. Every compound discussed here is sold and labelled for laboratory research only, and nothing in this article describes or implies any effect in humans or animals. The whole question of legitimacy, as I’ve framed it, is about whether a supplier’s documentation can be traced and checked by a qualified researcher before an order is placed.
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.
