Verdict: Purgo Labs, on the evidence: 10/10 rubric points against 6/10.
Purgo Labs: 10/10 · Trustpilot 4.7 (80 reviews) · SteriGenix · Freedom Diagnostics | Arizen BioLabs: 6/10 · 4.8 (42 reviews) · Janoshik (on certificates)
Disclosure: Purgo Labs is our affiliate partner, and so is Arizen BioLabs. Scores are produced by the published rubric, which has no partnership input.
The 10 criteria, side by side
| Criterion | Purgo Labs | Arizen BioLabs |
|---|
| Names its testing laboratory | ✔ SteriGenix and Freedom Diagnostics named per lot | ✔ Janoshik printed on the published certificate (task #103199); page text does not name the lab |
| Certificates verifiable at the lab, not just the vendor | ✔ Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com | ✘ Not awarded |
| Batch-specific COAs matched to lots | ✔ Lot numbers (e.g. PL-BPC-05) with test dates per batch | ✔ Certificate carries batch J0-2601-004 (BPC-157 10mg) |
| Publishes measured net content vs label | ✔ Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label) | ✔ Certificate reports 11.75mg and 11.44mg measured vs 10mg label |
| COAs and pricing viewable without an account | ✔ COAs on product pages without login | ✔ Certificates and pricing viewable after a researcher-gate click, no account |
| Independent review base (50+ on an external platform) | ✔ 4.7 / 80 on Trustpilot (re-read 6 Sep 2026; 4.7 / 75 on 14 Aug 2026) | ✘ Not awarded |
| No contradictions among its own claims | ✔ No contradictions found across site claims (checked Aug 2026) | ✘ Not awarded |
| Vial sizes stated with prices | ✔ Product pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record) | ✔ Sizes stated with prices (BPC-157 10mg $49.99, TB-500 10mg $79.99) |
| Publishes a legal entity and street address | ✔ PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026) | ✘ Not awarded |
| No misleading trust signals or buyer-protection workarounds | ✔ No 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) |
| Total | 10/10 | 6/10 |
Like-for-like prices
| Compound | Purgo Labs | Arizen BioLabs | Lower |
|---|
| BPC-157 10mg | $44.99 (2026-08-03) | $49.99 (2026-09-05) | Purgo Labs |
| NAD+ 500mg | $59.99 (2026-08-03) | $59.99 (2026-09-05) | Equal |
| TB-500 10mg | $49.99 (2026-08-14) | $79.99 (2026-09-05) | Purgo Labs |
Caveats
Purgo Labs: 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.
Arizen BioLabs: 42 reviews. The lab is named only on the certificate images — page text says 'independent, accredited laboratories' without naming one. Certificates are vendor-hosted; we could not confirm the task number at Janoshik. The legal entity (Arizen Bio Labs LLC) appears only in hidden page markup, with no address or phone. GLP products sold as ABL-1 SM / ABL-2 TRZ / ABL-3 RT with no stated identity. TB-500 has no published certificate.
Frequently asked
Is Purgo Labs better than Arizen BioLabs?
Purgo Labs, on the evidence: 10/10 rubric points against 6/10. Every point is a fact you can check on either vendor's site; both are scored by the same published rubric.
Is Arizen BioLabs legit?
Arizen BioLabs scores 6/10 on our rubric, has an independently viewable rating of 4.8 (42 reviews), and names its lab (Janoshik (on certificates)). Caveat: 42 reviews. The lab is named only on the certificate images — page text says 'independent, accredited laboratories' without naming one. Certificates are vendor-hosted; we could not confirm the task number at Janoshik. The legal entity (Arizen Bio Labs LLC) appears only in hidden page markup, with no address or phone. GLP products sold as ABL-1 SM / ABL-2 TRZ / ABL-3 RT with no stated identity. TB-500 has no published certificate.
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 Arizen BioLabs. Scores come from the rubric, which has no partnership input.
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