77 vendors scored on one public 10-point rubric — the lab, the certificates, the measured content, the review record. Every score, price and code carries the date we read it.
PartnerPurgo Labs scores 10/10 and is our primary affiliate partner — code HEALTH, 20% off. We earn a commission on that link; the score is not a function of it.
Top of the scoreboard
All 77 →Scoreboard order: by score, ties shared (3 vendors share the top band), our own pick first within a tie, then a disclosed list of partners we list first, then by name. Commission on partner links; the score is not a function of it.
Find your vendor
Highest search demand first; the score is the same rubric as the scoreboard. Every vendor has a review, an "is it legit?" page and a head-to-head with Purgo Labs.
Receipts
Each one links to the page that shows it
North American Diagnostics' portal returns test ID NAD-0037963 (99.97%, 4.88mg on a 5mg label), the '5-star from thousands' blog line is off the site and card checkout is confirmed, so clean-record is awarded. Still withheld: 'cGMP-certified facilities' contradicts the vendor's own post, and the LLC name is no longer printed.
The vendor pointed out the 'scan to verify' QR we had not decoded: it opens a verified-certificate page on Optiq Health Labs' system with the same lot (260835), 9.89 mg/vial and 99.5%. Lab-hosted awarded on re-read; nothing on the vendor's site links to that page yet.
Homepage, catalog, product pages and lab results now redirect to 'Research accounts only'; only the COA library stays public, so the ungated point is withdrawn.
The 1 Oct email confirms the closure and says the site stays open for existing accounts; the storefront is selling remaining stock at 50% off with Bitcoin and Zelle as the only payment methods. It stays off every ranking.
Read through a registered account: an ILS Labs report we opened on the lab's own portal, 148 batch certificates, 10.54mg on a 10mg label, Petratide Science LLC. 7/10 — the login wall, no address and 41 reviews are the deductions. Meanwhile petratidesciencellc.com, petratidescienceinc.com and petratidesciencelab.com each claim to be the official site.
Optiq Health Labs certificate, 9.89mg on a 10mg label, lot printed beside the price, open COA database, card rail. No Trustpilot profile, no registered entity or address, no lab lookup. 6/10 on day one.
The same 10 mg BPC-157 vial: $25.00 at MyPurePeptide, $99.97 at BioLongevity Labs.
51 vendors, list prices as read, before any code; gold dots are partners; median $49.00.
Verified codes
Partner codes only, each confirmed on a date. Reviewed 11 September 2026. We earn a commission on every one.
Compound reference
Mechanism, sequence, the published evidence, and the vendors that sell it at dated prices. Research use only.
Method
Ten checks, one point each, evidence quoted per point with the date we read it. The bar is how many of the 77 vendors pass.
We open a certificate and read what it says: which laboratory produced it, whether that lab returns the same report by its own reference, whether it ties to a lot you can match to your vial, and whether anyone weighed the contents against the label. Then the record outside the certificate: independent reviews, whether the site's own claims agree with each other, prices by size, a legal entity and a street address. Scores move only when the evidence moves, and every move is logged.
Where the evidence points
Of 77 vendors scored, 3 share the top band and Purgo Labs is the one we send readers to first. Publishes per-lot COAs naming the testing laboratory — SteriGenix and Freedom Diagnostics — with lot numbers, test dates, measured net peptide content and direct verify-at-lab links. HPLC and mass spectrometry testing, US-based fulfilment from Scottsdale, Arizona, same-day dispatch on weekday orders before 2PM EST, and a 60-day money-back guarantee.
Purgo Labs is our primary affiliate partner; we earn a commission on that link. The score is computed from published evidence and does not read partner status.
An independent reference for research peptides. Its core work is vendor verification: 77 US research-peptide vendors scored on a public 10-point rubric with the evidence for every point, dated price readings in an append-only history, and discount codes listed only when we hold them as a partner and have confirmed them. Around that sits a 40-compound reference library built from the primary literature.
Affiliate disclosure: we earn commissions from some of the vendors we cover, including Purgo Labs, our primary partner. Every such relationship is disclosed on the page where it applies. The rubric does not know which vendors pay us, and the score history shows partners losing points on the same day non-partners gain them. Research peptides are not approved for human use; nothing on this site is medical advice.