Marvel Pep: Lab Test Results
Independent Certificates of Analysis aggregated from public lab results. Not affiliated with or paid by Marvel Pep.
19
CoAs on file
99.79%
Avg reported purity
2
Compounds tested
Sep 8, 2026
Latest test
Results by compound
| Compound | CoAs | Avg purity | Latest |
|---|---|---|---|
| Retatrutide | 14 | 99.75% | Aug 2, 2026 |
| GHK-Cu | 5 | 99.91% | Sep 8, 2026 |
Recent CoAs
| Compound | Batch | Purity | Lab | Tested | |
|---|---|---|---|---|---|
| GHK-Cu | n/a | 99.9% | Lab E | Sep 8, 2026 | verify |
| Retatrutide | n/a | 99.9% | Lab E | Aug 2, 2026 | verify |
| Retatrutide | 258014 | 99.8% | Lab G | Jul 29, 2026 | verify |
| GHK-Cu | n/a | 99.9% | Lab E | Jul 12, 2026 | verify |
| Retatrutide | n/a | 99.2% | Lab E | Jul 12, 2026 | verify |
| Retatrutide | n/a | 99.8% | Lab G | Jun 7, 2026 | verify |
| Retatrutide | 258013 | 99.9% | Lab E | Jun 1, 2026 | verify |
| Retatrutide | n/a | 99.6% | Lab G | Apr 1, 2026 | verify |
| Retatrutide | 021526 | 99.8% | Lab G | Mar 6, 2026 | verify |
| GHK-Cu | n/a | 99.9% | Lab E | Mar 1, 2026 | verify |
| Retatrutide | n/a | 99.9% | Lab E | Feb 17, 2026 | verify |
| Retatrutide | Marv2510220131 | 99.9% | Lab E | Feb 10, 2026 | verify |
| GHK-Cu | n/a | 99.9% | Lab E | Feb 10, 2026 | verify |
| Retatrutide | Tr20-111 | 99.7% | Lab G | Feb 3, 2026 | verify |
| Retatrutide | n/a | 99.8% | Lab G | Jan 25, 2026 | verify |
| Retatrutide | n/a | 99.7% | Lab E | Jan 25, 2026 | verify |
| Retatrutide | n/a | 99.83% | Lab E | Dec 22, 2025 | verify |
| GHK-Cu | n/a | 99.95% | Lab E | Dec 16, 2025 | verify |
| Retatrutide | n/a | 99.7% | Lab G | Dec 15, 2025 | verify |
Showing 19 most recent of 19. Search the full database on the CoA page.
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<a href="https://ascendpeptide.org/coa/vendor/marvel-pep/" rel="noopener"> <img src="https://ascendpeptide.org/coa/badge/marvel-pep.svg" alt="Marvel Pep: lab tested, 19 CoAs on file at ASCEND Peptide" width="230" height="54"> </a>
Data comes from publicly posted third-party lab certificates (Janoshik, MZ Biolabs, and others) and community submissions. Purity figures are as reported by the testing lab for the specific batch tested; they are not a guarantee of any other batch. For research and informational purposes only.