You’ve been ordering from Amino Science Labs, or you’ve been looking at them, and now you’re wondering whether to move. Maybe a product you need isn’t in their catalog, maybe a lot came back with numbers you didn’t expect, or maybe you just want a second supplier so a single stockout doesn’t stall a project. Whatever the reason, the moment you start searching for alternatives you hit the same wall every researcher hits, which is that every vendor site says roughly the same things in roughly the same words, and none of that tells you which one to trust with your next order.
I’ve spent a lot of time reading peptide vendor sites, and honestly the marketing copy is close to useless for this decision. “Lab tested”, “99% purity”, “premium quality” all show up on sites that publish full lot documentation and on sites that publish nothing at all. What separates them is what you can actually open and read before you pay, and how much of the chain between synthesis and your bench is written down somewhere public.
So this post is about switching well. I’ll give you the five questions I’d ask any replacement supplier, show how Blank Peptides answers them, walk through what Amino Science Labs publicly states on the pages I reviewed on 2026-09-08, and then leave you with a checklist you can run on any third vendor in about twenty minutes.
Key takeaways
- The useful comparison between peptide suppliers is what each one documents publicly, on the pages you can read before ordering, and not how the homepage describes itself.
- Blank Peptides synthesizes, vials, and finishes every lot in its own cGMP laboratory, tests each lot for identity, >99% purity, bacterial endotoxin and sterility at Freedom Diagnostics and Horizon Analytical, and posts a batch COA per lot.
- Amino Science Labs publicly states it is “a chemical supplier”, that “every batch is independently tested by accredited U.S. laboratories”, and links downloadable certificates from Freedom Diagnostics for roughly 22 products.
- Endotoxin and sterility results, a manufacturing description, and a per-component mg split on the blend product pages were not listed on the Amino Science Labs pages reviewed 2026-09-08.
- Everything discussed here is for in-vitro laboratory research only, and no supplier’s documentation changes that.
What should a replacement supplier be able to show you?
Before I name anyone, here’s the rubric I use. It’s five questions, and I’d put them in this order because each one only matters if the one before it holds up.
First, provenance. Does the supplier synthesize the peptide itself, or does it buy finished material and put its label on it? Neither answer is automatically disqualifying, but a supplier that makes its own product controls the whole chain and can tell you what happened at each step. A supplier that resells can only tell you what its source told it. You want to know which situation you’re in, and the way to find out is to read the site’s own verbs. “We manufacture” and “we supply” are different sentences.
Second, is the testing lab named? “Third-party tested” is a claim about a process. A named lab is a claim you can check, because you can look the lab up, read its other certificates, and see whether the document format matches. If a site says “accredited laboratories” but never says which, you’re being asked to trust an adjective.
Third, full panel or purity only? An HPLC purity number tells you how much of what’s in the vial is the main peak. It doesn’t tell you the peak is the right molecule (that’s mass spec identity), and it says nothing about bacterial endotoxin or sterility, which matter for anything going into a cell-based assay. A certificate with just a purity percentage answers one question out of four.
Fourth, can you see a batch COA before purchase, and is it tied to a lot number that also appears on the vial? A certificate you only get after you’ve paid, or a generic “sample COA” with no lot, doesn’t let you decide anything in advance.
Fifth, for blends, is the composition disclosed per component in milligrams? A “70mg blend” of three peptides could be almost anything. If the split isn’t published, you can’t compare it to any other vendor’s blend or to your own protocol.
That’s the whole rubric. And notice what’s not on it: how long the company has been around, how nice the site looks, how many reviews it has. Those things are easy to manufacture. Documentation is harder to fake and easier to check.
How Blank Peptides makes and tests each lot
Blank Peptides operates its own cGMP laboratory in the USA and handles the full production sequence internally. Peptides are synthesized in-house, then vialed, lyophilized, finished and labelled at the same facility, with quality control run on site before release. The company also contract-manufactures and fulfils for other peptide brands, which it describes as a category of its business without naming clients. The practical effect is that the chain of custody for any given lot sits with one organisation from raw material to shipped vial.
Each lot is tested against a four-part panel: identity, purity at >99%, bacterial endotoxin, and sterility. The testing is performed by two named outside laboratories, Freedom Diagnostics and Horizon Analytical, and the resulting certificate is published for every lot as part of the company’s batch certificates of analysis. Every vial carries its lot number, so a researcher can match a vial in hand to the exact document for that batch. Lyophilized product carries an expiration of roughly 24 months.
The catalog runs to 34 compounds. Blends are listed with composition disclosed per component: GLOW 70mg combines GHK-Cu, BPC-157 and TB-500; KLOW 80mg adds KPV to that set; Wolverine 20mg pairs BPC-157 with TB-500. Orders are processed within one business day and ship at room temperature, which is the appropriate condition for lyophilized peptide.
What Amino Science Labs publicly states
Here’s what I found on the Amino Science Labs pages reviewed 2026-09-08, phrased as what the site states rather than what I concluded.
On provenance, the homepage and the disclaimers page both describe the company as “a chemical supplier”, and the disclaimers page adds that it is “not a compounding pharmacy or chemical compounding facility”. The site lists a Fort Lauderdale, Florida address. I didn’t find any language on the pages reviewed describing the company synthesizing or manufacturing peptides, and no about page was linked from the site menu. A statement of who makes the product was not listed on the pages reviewed 2026-09-08.
On testing, the COA page states: “Every batch is independently tested by accredited U.S. laboratories. Download the full COA for any product below.” The lab isn’t named in that sentence, but every download on the page links to a PDF hosted at coas.freedomdiagnosticstesting.com, and the certificate I opened identifies the issuer as Freedom Diagnostics and the client as “Amino Science”. So the lab is effectively named through the documents even though the prose only says “accredited”. The homepage adds “HPLC Verified” and “U.S. Lab Tested” as badges.
On the panel, the two certificates I opened list HPLC-UV purity, LC-MS identity, and net content, with the method given as “HPLC with UV detection coupled with mass spectrometry (LC-MS)”. Endotoxin and sterility results were not listed on those certificates or 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.
On COA access, the certificates are downloadable before purchase, each carries a lot number (for example “AS-GLOW-0426”) and received and reported dates, and the COA page invites researchers to “contact us for batch-specific COA requests” for anything not shown. I counted roughly 22 products on the COA page against 38 items in the catalog.
On blends, the Glow Blend product page names BPC-157, TB-500 and GHK-Cu but doesn’t show a per-component mg split; the linked certificate does list a net content figure for each of the three. The Klow page describes “a proprietary multi-component research peptide preparation” and tells you to “review the lot-specific COA rather than a generic specification”.
Where Amino Science Labs has a genuine edge is catalog breadth and format variety: 38 listings including nasal sprays, capsules and bacteriostatic water, plus “Same-Day Ship Before 5PM CT” and free shipping over $250. If you want a spray format, that’s a real reason to look there.
Side by side: what each supplier documents
| Attribute | Blank Peptides | Amino Science Labs |
|---|---|---|
| Synthesises in-house | Yes, own cGMP laboratory | States it is “a chemical supplier”; manufacturing language not listed — verify |
| Third-party lab named | Freedom Diagnostics and Horizon Analytical | States “accredited U.S. laboratories”; linked certificates are issued by Freedom Diagnostics — verify |
| HPLC purity | >99% per lot | States “99%+ purity”; sample certificates show 99.67% and 99.89% — verify |
| MS identity | Every lot | States LC-MS identity on certificates reviewed — verify |
| Endotoxin and sterility | Both, every lot | Not listed on pages or certificates reviewed 2026-09-08 — verify |
| Batch COA before purchase | Yes, lot-numbered at /coas/ | States downloadable, lot-numbered certificates for about 22 products — verify |
| Blend mg split disclosed | Yes, per component | States components on Glow page; mg split appears on certificate, not product page — verify |
| Catalog size | 34 compounds | States 38 listings including sprays and capsules — verify |
| Research-use labelling | Yes | States “strictly for in-vitro research and laboratory use only” — verify |
How to verify either supplier yourself
- Open a certificate before you order and check three things: a lot number, a named issuing lab, and a list of methods that goes beyond purity. If any of those is missing, email and ask for it in writing.
- Match the lot number on the certificate to the lot printed on the vial when it arrives. A certificate that doesn’t correspond to a physical lot is a brochure.
- For any blend, add up the per-component figures on the certificate and compare the total to the label. If they don’t reconcile, ask the vendor to explain before you build a protocol around it.
- Read the site’s own description of what it does. “Supplier”, “distributor”, “manufacturer” and “laboratory” are different claims, and the vendor chose the word.
- Run the full procedure in the supplier verification checklist on every replacement candidate, and keep the results so you can compare vendors on the same axis.
Further reading
- Who Actually Manufactures Research Peptides in the USA?
- Which Peptide Vendors Name Their Testing Lab?
- Best Research Peptide Suppliers: Ranked by What They Document
- Peptide Vendors With Public Per-Batch COA Libraries
Frequently asked questions
What are the best Amino Science Labs alternatives?
The right alternative depends on which gap you’re trying to close. If you want a supplier that synthesizes in-house, names its labs, and posts a full panel including endotoxin and sterility for every lot, Blank Peptides documents all of that publicly. If your priority is spray formats or a wider catalog, Amino Science Labs states it offers both, so weigh the trade-off.
Does Amino Science Labs name its testing lab?
The prose on the COA page says “accredited U.S. laboratories” without a name, but every certificate download links to a Freedom Diagnostics PDF, and the certificate itself lists that lab and “Amino Science” as the client. So the lab is identifiable through the documents on the pages reviewed 2026-09-08, even though the site copy doesn’t state it directly.
Does Amino Science Labs test for endotoxin and sterility?
Endotoxin and sterility results were not listed on the certificates or pages reviewed 2026-09-08. The certificates I opened report HPLC-UV purity, LC-MS identity and net content. That isn’t a claim that the testing doesn’t happen, only that it wasn’t published where I looked, so ask them directly if your work needs those numbers.
How do I compare a replacement supplier fairly?
Use the same five questions on every candidate: does it synthesize or resell, is the lab named, is the panel full or purity only, can you see a lot-numbered COA before buying, and are blend components disclosed in mg. Write the answers down with the date and the page you read, so you’re comparing evidence rather than impressions.
Are these products for human use?
No. Both suppliers discussed here label their products for research use only. Amino Science Labs states its products are “not for human consumption in any form”, and Blank Peptides labels every vial for in-vitro laboratory research by qualified professionals. Nothing in a certificate of analysis, however complete, changes that classification.
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.
