Independent side-by-side comparison of Licensed Peptides and OP Labs — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Licensed Peptides has more published third-party tests (2 vs 0); OP Labs carries more community reviews (175).
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. OP Labs has no independent Janoshik assays on file.
| Attribute | Licensed Peptides | OP Labs |
|---|---|---|
| Third-party tests | 2 tests, avg purity 99.4% | None published |
| Community rating | No reviews | 4.1/5 (175 reviews) |
| COA available | No | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | Not specified | United Kingdom |
| Year established | Unknown | 2022 |
| Substance | Licensed Peptides | OP Labs |
|---|---|---|
| Retatrutide 40mg | 99.72% (1 assay, latest 2025-10-09) | Not tested |
| Retatrutide 12mg | 99.11% (1 assay, latest 2025-08-27) | Not tested |
| Checked | Licensed Peptides | OP Labs |
|---|---|---|
| Certificates of analysis | None found on the site | None found on the site |
| Products listed | 91 | 69 |
| 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 Kingdom, Worldwide |
| Carriers | FedEx, UPS, USPS | Royal Mail |
| Research-use-only notice | Published | Published |
| Stated origin | United States | Not stated |
Licensed Peptides. Licensed Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.4%, most recent 2025-10-09. OP Labs has no independent Janoshik assays on file. 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 we found no certificates of analysis anywhere on OP Labs' 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 OP Labs states it ships to United Kingdom, Worldwide. Both are read from the vendors' own sites.
Full profiles: Licensed Peptides, OP Labs.
Full lab-test records: All 2 Licensed Peptides lab tests.
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