Disclosure: Purgo Labs is our affiliate partner, and so is PS Peptides. 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
No contradictions among its own claims — No contradictions found across site claims (checked Aug 2026)
Publishes a legal entity and street address — PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
Names North American Diagnostics as its lab, and the lab's own portal returns the record for test ID NAD-0037963: BPC-157, lot PSP-09112026BP, client 'ProSupply Peptides | pspeptides.com', 99.97% HPLC purity, 4.88mg on a 5mg label — looked up 3 Oct 2026.
Certificates publish measured mass against label alongside HPLC purity (4.88mg vs 5mg on NAD-0037963; 5.03mg vs 5mg on the September example) — the net-content criterion most vendors miss.
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
PSNorth American Diagnostics named; lab operates nadiagnostics.com with a public batch-lookup portal
North American Diagnostics named; lab operates nadiagnostics.com with a public batch-lookup portal
Lab-hosted COAs
PurgoVerify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
PSLab portal returns the record for test ID NAD-0037963 (BPC-157 5mg, lot PSP-09112026BP, client 'ProSupply Peptides | pspeptides.com', 99.97% purity, 4.88mg) — looked up on nadiagnostics.com/verify on 3 Oct 2026
Lab portal returns the record for test ID NAD-0037963 (BPC-157 5mg, lot PSP-09112026BP, client 'ProSupply Peptides | pspeptides.com', 99.97% purity, 4.88mg) — looked up on nadiagnostics.com/verify on 3 Oct 2026
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
PS59 certificates on /certifications/ (COA, heavy metals, endotoxin, sterility, fentanyl per lot); buyers told to match vial lot to certificate
59 certificates on /certifications/ (COA, heavy metals, endotoxin, sterility, fentanyl per lot); buyers told to match vial lot to certificate
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)
PSMeasured mass vs label published (4.88mg on a 5mg label on NAD-0037963, 97.6%; 5.03mg on PSP-0028020 in Sep)
Measured mass vs label published (4.88mg on a 5mg label on NAD-0037963, 97.6%; 5.03mg on PSP-0028020 in Sep)
Ungated
PurgoCOAs on product pages without login
COAs on product pages without login
PSDownloadable PDFs on every product page and public pricing without an account (re-read 3 Oct 2026)
Downloadable PDFs on every product page and public pricing without an account (re-read 3 Oct 2026)
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)
PS4.3 / 204 on Trustpilot, claimed profile (re-read 3 Oct 2026; was 4.1 / 174 on 5 Sep)
4.3 / 204 on Trustpilot, claimed profile (re-read 3 Oct 2026; was 4.1 / 174 on 5 Sep)
Consistent claims
PurgoNo contradictions found across site claims (checked Aug 2026)
No contradictions found across site claims (checked Aug 2026)
PSNot 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)
PSSizes stated with prices across the full GLP range
Sizes stated with prices across the full GLP range
Entity + address
PurgoPurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
PSNot awarded
Clean record
PurgoNo on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)
No on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)
PSAwarded 3 Oct 2026: the blog's '5-star Trustpilot rating from thousands' claim is no longer on the site; Visa/Mastercard/Amex/Discover, Afterpay, Klarna and wallets via Shopify Payments ('no crypto required, no surcharges'); no regulator action found
Awarded 3 Oct 2026: the blog's '5-star Trustpilot rating from thousands' claim is no longer on the site; Visa/Mastercard/Amex/Discover, Afterpay, Klarna and wallets via Shopify Payments ('no crypto required, no surcharges'); no regulator action found
Only vials both vendors list at the same size, read on each vendor's product page on the date shown. "After code" is list × the code's stated discount — a calculation, labelled as one; stacking with sale pricing is not cart-tested.
04
What we found at PS Peptides
Read 3 October 2026 on the vendor's own pages
The best certificate chain among the partners — a lab portal that returns the record, measured mass on the certificate — now with the inflated trust claim removed and a card rail confirmed. What is left is the vendor's own wording ('cGMP-certified' on one page, 'cGMP certificates do not exist' on another) and a company name that has quietly disappeared from the site.
Checks out
✓Names North American Diagnostics as its lab, and the lab's own portal returns the record for test ID NAD-0037963: BPC-157, lot PSP-09112026BP, client 'ProSupply Peptides | pspeptides.com', 99.97% HPLC purity, 4.88mg on a 5mg label — looked up 3 Oct 2026. source
✓Certificates publish measured mass against label alongside HPLC purity (4.88mg vs 5mg on NAD-0037963; 5.03mg vs 5mg on the September example) — the net-content criterion most vendors miss. source
✓59 certificates on the public certifications page — COA plus heavy-metals, endotoxin, sterility and fentanyl reports per lot — and a PDF on every product page, no account needed; buyers are told to match the vial lot to the certificate lot. source
✓Card checkout: Visa, Mastercard, Amex and Discover, plus Afterpay, Klarna, Apple Pay, Google Pay, Shop Pay, Cash App and Zelle through Shopify Payments — 'no crypto required, no surcharges' (read 3 Oct 2026). source
✓Full basket with sized pricing, including the widest GLP range we cover (tirzepatide 10–60mg, retatrutide 5–40mg). source
✓The September blog claim of a '5-star Trustpilot rating from thousands of customers' is no longer on the site (home, about, certifications and the two legit/best-vendor posts re-read 3 Oct 2026); the live profile is 4.3 across 204 reviews, claimed March 2026. source
Could not verify · flags
?No company name or street address now. In September the terms page named ProSupply Services LLC; the terms updated 17 May 2026 carry no entity, and the about page says only 'a 25-person team based in New Jersey'. Support is email-only ('we don't offer phone support'). The lab portal lists the client as 'ProSupply Peptides'.
?'Independent, accredited laboratories' on the home and about pages — no accrediting body is named anywhere on the site.
!Home and about pages say products are 'manufactured in cGMP-certified facilities'; the vendor's own 'is PS Peptides legit' post says 'the FDA does not issue cGMP certificates' and that 'a supplier that advertises one is describing a document that does not exist', describing its own facility as 'cGMP-compliant' instead. Both statements are live on 3 Oct 2026.
!Trustpilot 4.3 across 204 is the low end of our partner set (up from 4.1 / 174 in September). Read the one-star reviews before ordering; the themes are shipping delays and support response.
No entity name printed (ProSupply Services LLC appeared on the September terms page; the current terms drop it) · 'New Jersey-based' — no street address; lab portal client field reads 'ProSupply Peptides'
Looked up on the lab's own portal 3 Oct 2026: PASS, client 'ProSupply Peptides | pspeptides.com', ordered 17 Sep 2026, 4.88mg on a 5mg label (97.6%), 99.97% HPLC purity. Fentanyl screen report attached.
Other certificates we opened at PS Peptides: 1
2 verifiable at the lab2 state measured massmedian purity 99.97%median fill 99.1% of labellast read 2026-10-03
Each row is a certificate we opened and read ourselves; "verify at the lab" goes to the laboratory's own lookup, never a copy we host. Full COA library →
Where PS Peptides ranks by compound
PS Peptides appears in 20 of our compound rankings, top-3 in 6. Each ranking orders every scored vendor that sells the compound by rubric score, then verified price per mg.
2026-09-067/10 — re-issued under rubric v2 (was 7/8); not awarded: claims-consistent, identity, clean-record
2026-10-038/10 — 7/10 → 8/10: clean-record awarded — the '5-star Trustpilot from thousands' blog claim is no longer on the site, card rail confirmed (Visa/MC/Amex/Discover, Afterpay, Klarna); lab portal lookup completed for NAD-0037963 (99.97%, 4.88mg/5mg). Still withheld: claims-consistent ('cGMP-certified facilities' vs the vendor's own post that cGMP certificates do not exist; no accrediting body), identity (LLC name no longer printed, no address)
Purgo Labs: the caveat
Smaller independent review base than several competitors (80 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
PS Peptides: the caveat
Home and about pages claim 'cGMP-certified facilities' and 'accredited laboratories' while the vendor's own legit post says cGMP certificates do not exist, and no accrediting body is named. The ProSupply Services LLC name we read in September is no longer printed anywhere; 'New Jersey-based' only, no address, email-only support. Trustpilot 4.3 is still the low end of the partner set.
07
Where to order
Our pick
Purgo Labs 10/10
Certificates checkable at the lab, measured net content per lot, the deepest GLP-1 catalog we track.
Purgo Labs, on the evidence: 10/10 rubric points against 8/10. PS Peptides is stronger on 3 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 PS Peptides legit?
PS Peptides scores 8/10 on our rubric, has an independently viewable rating of 4.3 (204 reviews), and names its lab (North American Diagnostics). Caveat: Home and about pages claim 'cGMP-certified facilities' and 'accredited laboratories' while the vendor's own legit post says cGMP certificates do not exist, and no accrediting body is named. The ProSupply Services LLC name we read in September is no longer printed anywhere; 'New Jersey-based' only, no address, email-only support. Trustpilot 4.3 is still the low end of the partner set.
Which is cheaper, Purgo Labs or PS Peptides?
On the 10 compound-and-size rows where we have dated prices from both, PS Peptides lists lower on 0 and Purgo Labs on 9 (1 equal). Purgo's list prices drop 20% with code HEALTH; PS Peptides's drop with code HEALTH (10% off).
Do you earn money from either vendor?
Purgo Labs is our affiliate partner and we earn a commission on referred orders, as we do from PS Peptides. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.