Disclosure: Purgo Labs is our affiliate partner, and so is ZC Labs. 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
Independent review base (50+ on an external platform) — 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)
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)
Lower list price on 14 of 14 like-for-like rows we have on record (see table).
ILS Laboratories (San Diego) and Freedom Diagnostics named on the COA portal and on every certificate (read 1 Nov 2026)
ILS report COA-2026-956697 (BPC-157 10mg, lot 001-B) opened on portal.ils-lab.com as 'Verified Certificate', tested for Zc Labs, received 3 Jun and confirmed 10 Jun 2026 (read 1 Nov 2026)
02
The 10 criteria, side by side
10/10 vs 7/10 · one point each, no weighting
Named lab
PurgoSteriGenix and Freedom Diagnostics named per lot
SteriGenix and Freedom Diagnostics named per lot
ZCILS Laboratories (San Diego) and Freedom Diagnostics named on the COA portal and on every certificate (read 1 Nov 2026)
ILS Laboratories (San Diego) and Freedom Diagnostics named on the COA portal and on every certificate (read 1 Nov 2026)
Lab-hosted COAs
PurgoVerify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
ZCILS report COA-2026-956697 (BPC-157 10mg, lot 001-B) opened on portal.ils-lab.com as 'Verified Certificate', tested for Zc Labs, received 3 Jun and confirmed 10 Jun 2026 (read 1 Nov 2026)
ILS report COA-2026-956697 (BPC-157 10mg, lot 001-B) opened on portal.ils-lab.com as 'Verified Certificate', tested for Zc Labs, received 3 Jun and confirmed 10 Jun 2026 (read 1 Nov 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
ZC77 certificates across 26 products on the public COA portal, each tied to a lot or accession number, current and archived kept side by side (read 1 Nov 2026)
77 certificates across 26 products on the public COA portal, each tied to a lot or accession number, current and archived kept side by side (read 1 Nov 2026)
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)
ZCILS: 10.53 mg net peptide content on a 10 mg BPC-157 label, purity 99.62%; Freedom Diagnostics: 10.30 mg on 10 mg, purity 99.38% (lot ZC-BPC-104, reported 14 Aug 2026)
ILS: 10.53 mg net peptide content on a 10 mg BPC-157 label, purity 99.62%; Freedom Diagnostics: 10.30 mg on 10 mg, purity 99.38% (lot ZC-BPC-104, reported 14 Aug 2026)
Ungated
PurgoCOAs on product pages without login
COAs on product pages without login
ZCCatalog, prices and the full certificate portal open without an account (read 1 Nov 2026)
Catalog, prices and the full certificate portal open without an account (read 1 Nov 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)
ZCNot awarded
Consistent claims
PurgoNo contradictions found across site claims (checked Aug 2026)
No contradictions found across site claims (checked Aug 2026)
ZCNot 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)
ZCEvery listing states vial size and price by pack, read from the public Store API on 1 Nov 2026 (BPC-157 10mg $27.99; TB-500 10mg $41.99; NAD+ 500mg $34.99; MOTS-c 10mg $34.99)
Every listing states vial size and price by pack, read from the public Store API on 1 Nov 2026 (BPC-157 10mg $27.99; TB-500 10mg $41.99; NAD+ 500mg $34.99; MOTS-c 10mg $34.99)
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)
ZCNot 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)
ZCCards accepted alongside Zelle, Cash App, bank transfer and crypto (FAQ, read 1 Nov 2026); a 30-day money-back guarantee with nothing to return; no fraud, closure or impersonation record found
Cards accepted alongside Zelle, Cash App, bank transfer and crypto (FAQ, read 1 Nov 2026); a 30-day money-back guarantee with nothing to return; no fraud, closure or impersonation record 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 ZC Labs
Read 1 November 2026 on the vendor's own pages
Three points are withheld. Trustpilot shows only two reviews on an unclaimed profile, so there is no independent buyer record to read. And the homepage says seven tests run on every new batch at ILS, while the certificate for the current BPC-157 lot is a three-result Freedom Diagnostics report. The company is Zc Labs LLC with a PO box in Myrtle Beach, South Carolina; cards are accepted, and single vials were buy-one-get-one when we read the store. PeptideBenchmark scores ZC Labs low because it holds no certificates for the vendor, not because of a negative finding. ZC Labs is an affiliate partner of ours since 1 November 2026, after the evidence above was read; the score does not read that..
Evidence ledger · read 1 November 2026
7 verified1 contradiction1 flag4 could not verify
Verified — what we opened, with the date
VerifiedILS Laboratories (San Diego) and Freedom Diagnostics named on the COA portal and on every certificate (read 1 Nov 2026)
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VerifiedILS report COA-2026-956697
(BPC-157 10mg, lot 001-B) opened on portal.ils-lab.com as 'Verified Certificate', tested for Zc Labs, received 3 Jun and confirmed 10 Jun 2026 (read 1 Nov 2026)
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Verified77 certificates across 26 products on the public COA portal, each tied to a lot or accession number, current and archived kept side by side (read 1 Nov 2026)
—
VerifiedILS
10.53 mg net peptide content on a 10 mg BPC-157 label, purity 99.62%; Freedom Diagnostics: 10.30 mg on 10 mg, purity 99.38% (lot ZC-BPC-104, reported 14 Aug 2026)
—
VerifiedCatalog, prices and the full certificate portal open without an account
(read 1 Nov 2026)
—
VerifiedEvery listing states vial size and price by pack, read from the public Store API on 1 Nov 2026
VerifiedCards accepted alongside Zelle, Cash App, bank transfer and crypto (FAQ, read 1 Nov 2026)
a 30-day money-back guarantee with nothing to return; no fraud, closure or impersonation record found
—
Contradiction — the vendor's claims disagree with each other or with the evidence
ContradictionHomepage
'seven tests run on every new batch at ILS Laboratories'. The certificate for the current BPC-157 lot (ZC-BPC-104) is a Freedom Diagnostics report with three results (identity, purity, net content).
—
Flag — read before ordering
FlagTrustpilot has only two reviews (3.8, unclaimed profile), so there is no independent review base yet
The homepage says seven tests run 'on every new batch at ILS Laboratories', but the certificate shipping with today's BPC-157 lot is a three-result Freedom Diagnostics report, not the seven-test ILS panel. The only address is a PO box. The June ILS report names zclabs.shop, an earlier domain that no longer resolves. Ships within the US only.
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Could not verify — not on the record either way
Could not verifyA street address (the terms give only PO Box 284, Myrtle Beach, SC)
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Could not verifyThe Freedom Diagnostics reports at the lab's own search page
(we verified the ILS report instead)
—
Could not verifyAny independent test of ZC Labs product
(no Finnrick or PeptideBenchmark certificate on file)
—
Could not verifyThe '25,000+ orders shipped' figure on the homepage
—
Zc Labs LLC, PO Box 284, Myrtle Beach, SC 29578 (terms page); support@zc-labs.com. The June 2026 ILS report names an earlier domain, zclabs.shop, which no longer resolves.
Served from the laboratory's own system · RP-HPLC purity at 214 nm; net peptide content; identity; ICP-MS heavy metals; USP 85 endotoxin; sterility (PCR)
Check it yourself: Certificates print an ILS access code (e.g. NZHW9KJZ on COA-2026-Y_PBKT); enter it on the lab's site to pull the same report. The button above opens the lab's lookup.
ILS portal shows 'Verified Certificate', tested for Zc Labs (https://zclabs.shop, an earlier domain that no longer resolves). Full QC panel. The current BPC-157 lot ZC-BPC-104 carries a Freedom Diagnostics report instead (99.38%, 10.30 mg, accession 2608120180).
Where ZC Labs ranks by compound
ZC Labs appears in 14 of our compound rankings. Each ranking orders every scored vendor that sells the compound by rubric score, then verified price per mg.
1 Nov 20267/10 — first assessment (rubric v2); not awarded: identity (PO box only, no street address), review-base (Trustpilot 3.8 across 2 reviews, unclaimed), claims-consistent (homepage: seven tests on every new batch at ILS; the certificate for the current BPC-157 lot is a three-result Freedom Diagnostics report)
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.
ZC Labs: the caveat
Trustpilot has only two reviews (3.8, unclaimed profile), so there is no independent review base yet. The homepage says seven tests run 'on every new batch at ILS Laboratories', but the certificate shipping with today's BPC-157 lot is a three-result Freedom Diagnostics report, not the seven-test ILS panel. The only address is a PO box. The June ILS report names zclabs.shop, an earlier domain that no longer resolves. Ships within the US only.
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 7/10. ZC Labs 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 ZC Labs legit?
ZC Labs scores 7/10 on our rubric, has an independently viewable rating of 3.8 (2 reviews), and names its lab (ILS Laboratories + Freedom Diagnostics). Caveat: Trustpilot has only two reviews (3.8, unclaimed profile), so there is no independent review base yet. The homepage says seven tests run 'on every new batch at ILS Laboratories', but the certificate shipping with today's BPC-157 lot is a three-result Freedom Diagnostics report, not the seven-test ILS panel. The only address is a PO box. The June ILS report names zclabs.shop, an earlier domain that no longer resolves. Ships within the US only.
Which is cheaper, Purgo Labs or ZC Labs?
On the 14 compound-and-size rows where we have dated prices from both, ZC Labs lists lower on 14 and Purgo Labs on 0. Purgo's list prices drop 20% with code HEALTH; ZC Labs's drop with code health (10% off single vials).
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 ZC Labs. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.
