Independent side-by-side comparison of Licensed Peptides and Modern Peptides — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Modern Peptides shows higher average tested purity (99.7% vs 99.4%); Modern Peptides has more published third-party tests (25 vs 2).
Every figure below is either measured by an independent laboratory or read from the vendor's own website, and the source is named against it. PeptideAtlas is not affiliated with either vendor.
Licensed Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.4%, most recent 2025-10-09. Modern Peptides: 25 independent Janoshik assays, across 20 substances, median measured purity 99.8%, most recent 2026-02-24.
| Attribute | Licensed Peptides | Modern Peptides |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.4% | 25 tests, avg purity 99.7% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Licensed Peptides | Modern Peptides |
|---|---|---|
| Retatrutide 20mg | Not tested | 99.80% (3 assays, latest 2026-02-24) |
| Retatrutide 10mg | Not tested | 99.74% (2 assays, latest 2026-01-26) |
| Tirzepatide 15mg | Not tested | 99.78% (2 assays, latest 2026-01-16) |
| Tesamorelin 20mg | Not tested | 99.75% (2 assays, latest 2026-01-09) |
| Retatrutide 40mg | 99.72% (1 assay, latest 2025-10-09) | Not tested |
| Retatrutide 12mg | 99.11% (1 assay, latest 2025-08-27) | Not tested |
| Retatrutide 50mg | Not tested | 99.92% (1 assay, latest 2026-02-24) |
| KLOW 80 | Not tested | purity not reported (1 assay, latest 2026-02-23) |
| Tirzepatide 30mg | Not tested | 99.85% (1 assay, latest 2026-01-26) |
| Cartalax 20mg | Not tested | 99.71% (1 assay, latest 2026-01-16) |
| Bpc-157 20mg | Not tested | 99.50% (1 assay, latest 2026-01-16) |
| GLOW 70 (bpc-157, Tb500, Ghk-cu) | Not tested | purity not reported (1 assay, latest 2025-12-15) |
| Checked | Licensed Peptides | Modern Peptides |
|---|---|---|
| Certificates of analysis | None found on the site | 1 published on the site |
| Products listed | 91 | 75 |
| Public pricing | Listed on the site | Listed on the site |
| Payment methods | Bank Transfer, Credit Card | Cryptocurrency, Bank Transfer, Credit Card |
| Ships to | United States | United States, United Kingdom, Canada, Worldwide |
| Carriers | FedEx, UPS, USPS | FedEx, UPS, USPS, Canada Post |
| Research-use-only notice | Published | Published |
| Stated origin | United States | Not stated |
Modern Peptides. Licensed Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.4%, most recent 2025-10-09. Modern Peptides: 25 independent Janoshik assays, across 20 substances, median measured purity 99.8%, most recent 2026-02-24. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on Licensed Peptides' site, and Modern Peptides publishes 1 certificate of analysis on its own site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Licensed Peptides states it ships to United States, and Modern Peptides states it ships to United States, United Kingdom, Canada, Worldwide. Both are read from the vendors' own sites.
Full profiles: Licensed Peptides, Modern Peptides.
Full lab-test records: All 2 Licensed Peptides lab tests, All 25 Modern Peptides lab tests.
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