Sourcing
Vendor sourcing
Not a list of shops worth buying from. A record of what each vendor publishes about what is in the vial, checked the same way everything else here is checked.
Rows marked † are affiliate links: if you buy through one, this site earns a commission at no extra cost to you. That relationship does not decide who appears here and it does not soften what any row says — the findings below are the same ones that would be published without it. Every vendor on this table is one of them, and that defines what this page is: a record of the suppliers this publication has a relationship with, checked the same way everything else here is checked. It is not a survey of the market and it is not a ranking of every vendor worth considering — plenty are not on it. The rows least flattering to a partner are the ones that tell you whether to believe the rest.
Nothing here is a recommendation to buy, and a row is not a claim that a compound is safe or legal to use. Publishing a certificate of analysis separates almost nobody — nearly every vendor here does it. What separates them is whether that certificate can be checked away from the vendor: a self-hosted PDF leaves the document and the thing it certifies under one party’s control, while a key that resolves at the laboratory’s own site does not. Of the eleven below, six clear that bar. Beyond it, what differs is how much each certificate actually covers and how much work it takes to reach.
One caveat covers all of them. These certificates test a sample the vendor sent to a laboratory. Even the best of them tells you what was in the vial that went to the lab — not what is in the vial that arrives at your door.
Comparing prices rather than paperwork? Biohack Blueprint lists what each of these vendors charges per milligram. It is a separate site run by this publication, and its links are affiliate links.
| Vendor | Code | Third-party COA | Tested for | Noted |
|---|---|---|---|---|
| Modern Aminos †Checked 14 Aug 2026 | ZACH1010% off | Batch-specificQR on the vial, batch search, full indexKovera Labs — named on the certificate, not on the siteVerifiable at the lab: koveralabs.com/verify, report ID printed on the certificate | Identity, Purity, Content (mg), Endotoxin, Heavy metalsread from report KVR-2026-31A4AA, confirmed at the lab | The most thorough testing here, and the easiest to check for yourself. Kovera tests four separate vials from every batch and publishes all four: batch BX-P-D7N6 came back 99.817%, 99.957%, 99.904% and 99.928%, averaging 99.901%. Nobody else here samples more than two. Scan the QR code on the vial and it opens that batch’s own certificate. Their site credits "certified US-based laboratories" without ever naming Kovera, which rather undersells them. |
| American Peptides †Checked 14 Aug 2026 | BHACK10% off | Batch-specificlisted by product and lotBioviridianVerifiable at the lab: bioviridians.com/coa-search.html, code printed on the certificate | Identity, Purity, Content (mg), Sterility, Endotoxin, Heavy metalsread from certificate COA5627, confirmed at the lab | Makes the most specific claims of anyone here, and every one of them checks out. Lot RETA10-0616: 99.8% purity, identity confirmed by MALDI-MS, with sterility, endotoxin and heavy metals all to USP standards, a chromatogram and a photograph of the vial. The verification code printed on the certificate resolves at the laboratory’s own site. |
| ResearchChemHQ †Checked 14 Aug 2026 | BHACK10% off | Batch-specificsearchable by batch numberKovera Labs, confirmed on the document; four others named on the siteVerifiable at the lab: koveralabs.com/verify, report ID printed on the certificate | Identity, Purity, Content (mg), Sterility, Endotoxin, Heavy metalsread from report KVR-2026-B5C66E, confirmed at the lab | Names five laboratories, more than anyone here, and the certificate confirms one of them. Report KVR-2026-B5C66E: 99.408% purity, identity by LC-MS, sterility, endotoxin, a fentanyl screen, and heavy metals reported analyte by analyte — the most granular breakdown on this table. The report ID resolves at Kovera’s public search. |
| Optimum Formula †Checked 14 Aug 2026 | BHACK10% off | Batch-specificsortable library, ~75 datedKovera Labs and ILS Labs, both confirmed on documentsVerifiable at the lab: koveralabs.com/verify — the ILS certificates did not resolve | Identity, Purity, Content (mg), Sterility, Endotoxinread from certificates COA-2026-412951 and KVR-2026-B5C66E-S234 | Publishes more history than anyone here, around 75 dated certificates going back to August 2025, and the documents behind them are strong. Batch #HXAC8: 99.51% purity against a 95% spec, identity confirmed, sterility clear, endotoxins under 0.05 EU/mL, signed at an ISO 17025 accredited lab, with Kovera reports that verify at that lab’s public search. Two things worth knowing rather than worrying about. The library index prints milligram mass under a heading reading "Analytical Purity", so a figure there can look odd when it is simply mislabelled. And checkout is Venmo, Cash App or card-to-crypto, which carries no chargeback route. Its Tesamorelin comes from the same batch as ResearchChemHQ’s under one shared Kovera report, useful if you are comparing the two. |
| BioSLab †Checked 14 Aug 2026 | BHACK10% off | Batch-specificon each product page, third-party and in-house shown separatelyJanoshik AnalyticalVerifiable at the lab: janoshik.com/verify, unique key printed on each report | Purity, Content (mg)read from Janoshik task #81862 | Publishes third-party and in-house results as two separately labelled links on every product page, a distinction most vendors blur rather than draw. The Janoshik report for lot TR102507H shows 99.664% purity and 11.04 mg content, and verifies at the laboratory’s own site. The panel covers purity and content, and the certificates carry the name BioSynergen Peptides. |
| LimitlessBioChem †Checked 13 Aug 2026 | BHACK10% off | Batch-specificrecent reports on the homepageJanoshik AnalyticalVerifiable at the lab: verify.janoshik.com, key printed on each report | Content (mg)read from report #212991, not vendor copy | Its certificates verify at Janoshik’s own site, which is exactly the right thing to look for. Report #212991 covers content — 2.02 mg against a 2 mg label — rather than the fuller purity and safety panel some vendors here publish. Confirmable, and narrower in scope. |
| Ion Peptide †Checked 14 Aug 2026 | BHACK15% off | Batch-specificproduct menu, current lot flaggedILS Labs, San Diego — ISO/IEC 17025 accredited | Identity, Purity, Content (mg), Sterility, Endotoxin, Heavy metalsread from certificate COA-2026-A-227X | The broadest test panel here, and the only vendor whose certificates print the actual HPLC chromatogram rather than just the number it produced. Batch BPC10-05202026: 99.84% purity, sterility, endotoxins, heavy metals and a fentanyl screen. The library also flags which lot is current, which almost nobody does. The verification link printed on the certificate did not resolve when followed. |
| Amino Club †Checked 14 Aug 2026 | BHACK20% first order, then 10% | Batch-specificcertificate on each product pageILS Labs, San Diego | Identity, Purity, Content (mg)read from certificate COA-2026-8RFWXN | Does something nobody else here does: tests two samples from every batch and publishes the spread. Lot TRZ0001 came back 99.59% and 99.76%, mean 99.68%. One number tells you what a single vial contained; two tell you whether the batch is consistent. Purity 99.76%, identity confirmed, fentanyl screened. The panel stops there — no sterility, endotoxin or heavy metals. |
| BioLongevity Labs †Checked 14 Aug 2026 | BHACK15% off | Batch-specificbrowsable index, ~359 entriesMDx BioAnalytical Laboratory — the homepage names SafeCert instead | Identity, Purity, Content (mg), Endotoxinread from certificate COA261565 | The largest library here at around 359 certificates, and the documents are thorough: 99.77% purity, 10.16 mg against a 10 mg label, endotoxin pass, chromatography, mass spectrometry and a photograph of the labelled vial. The certificates are issued by MDx BioAnalytical Laboratory, while the homepage credits SafeCert — worth reconciling. |
| Limitless Life Nootropics †Checked 13 Aug 2026 | BHACK15% off | On request | Identity, Purity, Sterility, Endotoxin | Describes its testing in more detail than almost anyone here: HPLC, LC-MS, sterility and endotoxin on every batch. The certificates come with the order rather than being published in advance, so there is nothing to read while you are still deciding. |
| Amino Tech †Checked 13 Aug 2026 | BHACK15% off | None published | — | States on every product page that each batch is independently third-party tested for identity and purity. The certificates are not published on the site, so you would need to ask for one. The catalogue is also much broader than peptides, extending into SARMs, post-cycle compounds, thyroid hormone and clenbuterol. |
What the COA column means
- Batch-specific — Certificate tied to the lot number on the vial
- Generic — One certificate reused across the catalogue
- On request — Says a certificate exists but does not publish it
- None published — No certificate of analysis published
- Verifiable at the lab — the certificate can be checked at the testing laboratory’s own site, using a key printed on the report, rather than only as a document the vendor hosts
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