Independent side-by-side comparison of Apex Peptides and Reta-Peptide — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Reta-Peptide holds the stronger independent lab grade (ungraded vs D); Reta-Peptide shows higher average tested purity (99.5% vs 99.2%); Reta-Peptide has more published third-party tests (19 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.
Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20.
| Attribute | Apex Peptides | Reta-Peptide |
|---|---|---|
| Independent lab grade | Not graded | D |
| Third-party tests | 2 tests, avg purity 99.2% | 19 tests, avg purity 99.5% |
| COA available | No | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Substance | Apex Peptides | Reta-Peptide |
|---|---|---|
| Tesamorelin | Not tested | 99.34% (2 assays, latest 2025-11-19) |
| Tirzepatide 60mg | Not tested | 99.83% (2 assays, latest 2025-04-18) |
| Retatrutide 40mg | 99.28% (1 assay, latest 2026-02-04) | Not tested |
| Retatrutide 20mg | 99.07% (1 assay, latest 2026-02-04) | Not tested |
| KLOW (ghk Or Ghk-cu/ Tb-500/ Bpc-157/ Kpv) | Not tested | purity not reported (1 assay, latest 2025-11-20) |
| Bpc-157/tb-500 Blend | Not tested | purity not reported (1 assay, latest 2025-11-20) |
| Cjc-1295 With DAC 5 | Not tested | 98.28% (1 assay, latest 2025-11-19) |
| Cagrilintide | Not tested | 99.34% (1 assay, latest 2025-11-19) |
| Semaglutide | Not tested | 99.62% (1 assay, latest 2025-11-19) |
| Retatrutide | Not tested | 99.48% (1 assay, latest 2025-11-19) |
| Tirzepatide | Not tested | 99.86% (1 assay, latest 2025-11-19) |
| Tirzepatide 30mg | Not tested | 99.78% (1 assay, latest 2025-07-22) |
| Checked | Apex Peptides | Reta-Peptide |
|---|---|---|
| Certificates of analysis | None found on the site | None found on the site |
| Products listed | 29 | 35 |
| Public pricing | Listed on the site | Listed on the site |
| Payment methods | Not stated | Cryptocurrency, Bank Transfer |
| Ships to | United States | United States, United Kingdom, Canada, Australia, New Zealand |
| Carriers | Not stated | DHL, FedEx, UPS, USPS |
| Research-use-only notice | Published | Not stated |
| Stated origin | Not stated | China |
Reta-Peptide. Apex Peptides: 2 independent Janoshik assays, across 2 substances, median measured purity 99.2%, most recent 2026-02-04. Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
We found no certificates of analysis anywhere on Apex Peptides' site, and we found no certificates of analysis anywhere on Reta-Peptide's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
Apex Peptides states it ships to United States, and Reta-Peptide states it ships to United States, United Kingdom, Canada, Australia, New Zealand. Both are read from the vendors' own sites.
Full profiles: Apex Peptides, Reta-Peptide.
Full lab-test records: All 2 Apex Peptides lab tests, All 19 Reta-Peptide lab tests.
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