Every vendor below is ranked by publicly published third-party test results — purity and quantity against label claims — not by who pays us. In 2024, roughly 43% of research peptides submitted to independent testing missed their label claims, which is why the published record, not marketing, decides this list. Every score links to its source.
| # | Vendor | Verified batches | Avg tested purity | Price/mg | Last tested | Score | |
|---|---|---|---|---|---|---|---|
| 1 | Nova Peptide | 4 | — | $0.76 | 10 Jul 2026 | 83 | Profile → |
| 2 | Paradigm Peptide | 18 | — | $4.50 | 30 Apr 2026 | 82 | Profile → |
| 3 | Bio Pepz | 4 | — | — | 17 Nov 2025 | 82 | Profile → |
| 4 | OmegAmino | 4 | — | $9.80 | 12 Aug 2025 | 82 | Profile → |
| 5 | Tirz Peptide | 4 | — | $0.69 | 4 Aug 2026 | 82 | Profile → |
| 6 | Maurits Bio | 2 | — | — | 5 Aug 2026 | 81 | Profile → |
| 7 | CertaPeptides | 2 | — | — | 17 Jul 2026 | 81 | Profile → |
| 8 | Trusted Peptide | 2 | — | — | 29 Dec 2025 | 81 | Profile → |
| 9 | Cactus Peptides | 4 | — | $0.41 | 15 Jun 2026 | 81 | Profile → |
Every vendor with public lab data is listed and scored free of charge. Sponsored placement is labeled and never affects score or rank. How scoring works.
There is no "safe" in an unregulated market — only verifiable. The safest available option is a vendor whose recent, batch-specific, third-party results you can check yourself, which is exactly what this ranking surfaces.
They are sold "for research use only" and are not approved medicines. Rules and enforcement differ by country — Canadian buyers should read our Canada guide.
Affiliate links, coupon codes, and clearly labeled placements — never by selling scores or positions. Every vendor with public lab data is listed free, whether they like it or not. Full policy: affiliate disclosure.
Either no publicly published third-party results exist for them yet, or their profile is pending review. Vendors can submit their lab results — publishing tested batches is how a listing is earned.