Disclosure: Purgo Labs is our affiliate partner; we earn nothing from Onyx Biolabs. Scores come from the public rubric, which has no partnership input.
Research use only. Compound Review scores vendors on documentation — laboratory certificates, lot records, pricing and company identity. Nothing on this page is guidance on human or veterinary use, dosing or health outcomes.
01
Where each vendor is stronger
Computed from the rubric, prices and review record — never curated
Purgo Labs
COAs and pricing viewable without buying anything — COAs on product pages without login
No contradictions among its own claims — No contradictions found across site claims (checked Aug 2026)
Re-checked 10 October 2026: Trustpilot 4.5 across 79, claimed — unchanged; the lab-results page (80 reports, Kovera Labs and Janoshik named) is still public without an account.
Names Kovera Labs on every batch certificate (Janoshik for HCG); certificates carry Kovera-format access codes for koveralabs.com/verify and state net content.
02
The 10 criteria, side by side
10/10 vs 8/10 · one point each, no weighting
Named lab
PurgoSteriGenix and Freedom Diagnostics named per lot
SteriGenix and Freedom Diagnostics named per lot
OnyxKovera Labs named on all batch certificates; Janoshik for HCG (6 Sep 2026)
Kovera Labs named on all batch certificates; Janoshik for HCG (6 Sep 2026)
Lab-hosted COAs
PurgoVerify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
OnyxCertificates carry Kovera-format access codes (e.g. EHNOQRS) for koveralabs.com/verify
Certificates carry Kovera-format access codes (e.g. EHNOQRS) for koveralabs.com/verify
Per-lot COAs
PurgoLot numbers (e.g. PL-BPC-05) with test dates per batch
Lot numbers (e.g. PL-BPC-05) with test dates per batch
OnyxPer-batch certificates listed on /lab-results/ (e.g. TIR30-260901A)
Per-batch certificates listed on /lab-results/ (e.g. TIR30-260901A)
Net content
PurgoMeasured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
OnyxCertificates state net content (e.g. tirzepatide 30mg batch TIR30-260901A: 99.233% purity with net-content line)
Certificates state net content (e.g. tirzepatide 30mg batch TIR30-260901A: 99.233% purity with net-content line)
Ungated
PurgoCOAs on product pages without login
COAs on product pages without login
OnyxNot awarded
Review base
Purgo4.7 / 101 on Trustpilot, claimed; three reviews below four stars, all replied to (complaint read 9 Oct 2026; was 4.7 / 99 on 2 Oct)
4.7 / 101 on Trustpilot, claimed; three reviews below four stars, all replied to (complaint read 9 Oct 2026; was 4.7 / 99 on 2 Oct)
Onyx4.5 / 79 on Trustpilot, claimed; six reviews below four stars, all replied to (complaint read 9 Oct 2026)
4.5 / 79 on Trustpilot, claimed; six reviews below four stars, all replied to (complaint read 9 Oct 2026)
Consistent claims
PurgoNo contradictions found across site claims (checked Aug 2026)
No contradictions found across site claims (checked Aug 2026)
OnyxNot awarded
Sized pricing
PurgoProduct pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)
Product pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)
No compound-and-size pair with dated prices from both vendors yet. Each vendor's readings are on the price index.
04
What we found at Onyx Biolabs
Read 10 October 2026 on the vendor's own pages
Kovera certificates with access codes and net content, a company with an address, a modest but real review base, and low prices — now behind a login. Since October the catalog and prices need an account, which costs the ungated point; the badge that rounds 4.5 up to 4.6 still costs claims-consistent. Eight of ten.
Evidence ledger · read 10 October 2026
5 verified1 contradiction4 flags3 could not verify
Verified — what we opened, with the date
VerifiedRe-checked 10 October 2026
Trustpilot 4.5 across 79, claimed — unchanged; the lab-results page (80 reports, Kovera Labs and Janoshik named) is still public without an account.
—
VerifiedNames Kovera Labs on every batch certificate (Janoshik for HCG)
certificates carry Kovera-format access codes for koveralabs.com/verify and state net content.
/shop/ and every product URL redirect to /my-account/ with the message 'Researcher Portal Required: To view our full catalog, active inventory, and affordable direct pricing, please sign in or register an account.' The lab-results page is still public. We did not register; the ungated point is withdrawn and the score moves from 9 to 8.
This certificate does not state measured net content — purity alone does not tell you how much is in the vial, which is why the rubric scores them separately.
Check it yourself: Enter the KVR report number and the access code printed on the certificate. The button above opens the lab's lookup.
Net-content line present; value not transcribed at read time.
06
Score history and the caveats
A score only moves when the evidence does
6 Sep 20269/10 — first assessment under rubric v2; not awarded: claims-consistent
10 Oct 20268/10 — ungated withdrawn: the shop and every product page now redirect to a login ('Researcher Portal Required'); the lab-results page stays public. Trustpilot 4.5 / 79 unchanged
Purgo Labs: the caveat
Smaller independent review base than several competitors (101 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
Onyx Biolabs: the caveat
Re-read 10 October 2026: the shop and every product page now redirect to a login ('Researcher Portal Required'); the lab-results page is still public. The ungated point is withdrawn (9 → 8/10). The 65-review base is still modest. Independent reviewers have questioned the >99% purity claim because the certificates are not independently verified. Multiple similarly named Onyx storefronts exist with overlapping catalogs — confirm which one you are ordering from.
07
Where the evidence points
Where the evidence points
Purgo Labs 10/10
We earn nothing from Onyx Biolabs. Purgo Labs holds every rubric point — certificates checkable at the lab, measured net content per lot — with a live, independent review record.
Purgo Labs, on the evidence: 10/10 rubric points against 8/10. Onyx Biolabs is stronger on 2 points listed below. Every point is a fact you can check on either vendor's site; both are scored by the same published rubric.
Is Onyx Biolabs legit?
Onyx Biolabs scores 8/10 on our rubric, has an independently viewable rating of 4.5 (79 reviews), and names its lab (Kovera Labs · Janoshik (HCG)). Caveat: Re-read 10 October 2026: the shop and every product page now redirect to a login ('Researcher Portal Required'); the lab-results page is still public. The ungated point is withdrawn (9 → 8/10). The 65-review base is still modest. Independent reviewers have questioned the >99% purity claim because the certificates are not independently verified. Multiple similarly named Onyx storefronts exist with overlapping catalogs — confirm which one you are ordering from.
Which is cheaper, Purgo Labs or Onyx Biolabs?
We do not yet have a like-for-like price pair for these two vendors; the Peptide Price Index has each vendor's dated readings.
Do you earn money from either vendor?
Purgo Labs is our affiliate partner and we earn a commission on referred orders; we earn nothing from Onyx Biolabs. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.
What is the difference between Onyx Biolabs and Onyx Research?
This is the most confusing thing about the brand and worth understanding before you order. Several Onyx-branded storefronts exist — onyxbiolabs.com, onyxresearch.shop, onyxgenetics-research.com and onyx.bio. Onyx Research and Onyx Biolabs have been reported to share parent ownership while operating as separate storefronts with overlapping catalogs and identical testing claims. Each carries its own separate review history, so a rating you read for one does not necessarily describe the entity you are buying from. Confirm which storefront you are actually transacting with, particularly if you may need a refund.
Where is Onyx Biolabs located?
Onyx Biolabs states it is headquartered in Charlotte, North Carolina, and positions itself as a domestic US supplier. Purgo Labs operates from Scottsdale, Arizona. Both are US-based, so domestic fulfilment is comparable and neither involves international customs delays.
