Independent side-by-side comparison of OP Labs and regenix-peptides.co — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: regenix-peptides.co has more published third-party tests (1 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.
OP Labs has no independent Janoshik assays on file. regenix-peptides.co: 1 independent Janoshik assay, median measured purity 99.8%, most recent 2025-08-12.
| Attribute | OP Labs | regenix-peptides.co |
|---|---|---|
| Third-party tests | None published | 1 test, avg purity 99.8% |
| Community rating | 4.1/5 (175 reviews) | No reviews |
| COA available | Yes | Yes |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | United Kingdom | Not specified |
| Year established | 2022 | Unknown |
| Substance | OP Labs | regenix-peptides.co |
|---|---|---|
| Retatrutide 20mg | Not tested | 99.75% (1 assay, latest 2025-08-12) |
| Checked | OP Labs | regenix-peptides.co |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 69 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Payment methods | Cryptocurrency, Bank Transfer, Credit Card | Not stated |
| Ships to | United Kingdom, Worldwide | Not stated |
| Carriers | Royal Mail | Not stated |
| Research-use-only notice | Published | Not stated |
Regenix-peptides.co. OP Labs has no independent Janoshik assays on file. regenix-peptides.co: 1 independent Janoshik assay, median measured purity 99.8%, most recent 2025-08-12. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on OP Labs' site, and regenix-peptides.co states that COAs are available. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
OP Labs states it ships to United Kingdom, Worldwide, and regenix-peptides.co does not state one. Both are read from the vendors' own sites.
Full profiles: OP Labs, regenix-peptides.co.
Full lab-test records: All 1 regenix-peptides.co lab test.
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