Independent side-by-side comparison of Reta-Peptide and Ro — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Reta-Peptide holds the stronger independent lab grade (D vs ungraded); Reta-Peptide has more published third-party tests (19 vs 0); Ro carries more community reviews (15200).
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.
Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20. Ro has no independent Janoshik assays on file.
| Attribute | Reta-Peptide | Ro |
|---|---|---|
| Independent lab grade | D | Not graded |
| Third-party tests | 19 tests, avg purity 99.5% | None published |
| Community rating | No reviews | 4.6/5 (15200 reviews) |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Production country | Not specified | United States |
| Year established | Unknown | 2017 |
| Substance | Reta-Peptide | Ro |
|---|---|---|
| Tesamorelin | 99.34% (2 assays, latest 2025-11-19) | Not tested |
| Tirzepatide 60mg | 99.83% (2 assays, latest 2025-04-18) | Not tested |
| KLOW (ghk Or Ghk-cu/ Tb-500/ Bpc-157/ Kpv) | purity not reported (1 assay, latest 2025-11-20) | Not tested |
| Bpc-157/tb-500 Blend | purity not reported (1 assay, latest 2025-11-20) | Not tested |
| Cjc-1295 With DAC 5 | 98.28% (1 assay, latest 2025-11-19) | Not tested |
| Cagrilintide | 99.34% (1 assay, latest 2025-11-19) | Not tested |
| Semaglutide | 99.62% (1 assay, latest 2025-11-19) | Not tested |
| Retatrutide | 99.48% (1 assay, latest 2025-11-19) | Not tested |
| Tirzepatide | 99.86% (1 assay, latest 2025-11-19) | Not tested |
| Tirzepatide 30mg | 99.78% (1 assay, latest 2025-07-22) | Not tested |
| Tesamorelin 10mg | 99.08% (1 assay, latest 2025-07-19) | Not tested |
| Cagrilintide 10mg | 99.66% (1 assay, latest 2025-07-19) | Not tested |
| Checked | Reta-Peptide | Ro |
|---|---|---|
| Certificates of analysis | None found on the site | Not stated |
| Products listed | 35 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Payment methods | Cryptocurrency, Bank Transfer | Not stated |
| Ships to | United States, United Kingdom, Canada, Australia, New Zealand | Not stated |
| Carriers | DHL, FedEx, UPS, USPS | Not stated |
| Stated origin | China | Not stated |
Reta-Peptide. Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20. Ro 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 Reta-Peptide's site, and we have not read Ro's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Reta-Peptide states it ships to United States, United Kingdom, Canada, Australia, New Zealand, and Ro does not state one. Both are read from the vendors' own sites.
Full profiles: Reta-Peptide, Ro.
Full lab-test records: All 19 Reta-Peptide lab tests.
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