YB Peptide: Lab Test Results
Independent Certificates of Analysis aggregated from public lab results. Not affiliated with or paid by YB Peptide.
22
CoAs on file
99.33%
Avg reported purity
4
Compounds tested
May 31, 2026
Latest test
Results by compound
| Compound | CoAs | Avg purity | Latest |
|---|---|---|---|
| Retatrutide | 8 | 99.81% | Apr 27, 2026 |
| BPC-157 | 5 | 99.82% | Mar 9, 2026 |
| Tesamorelin | 5 | 98.03% | Apr 27, 2026 |
| Tirzepatide | 4 | 99.5% | May 31, 2026 |
Recent CoAs
| Compound | Batch | Purity | Lab | Tested | |
|---|---|---|---|---|---|
| Tirzepatide | n/a | 99.6% | Lab E | May 31, 2026 | verify |
| Retatrutide | n/a | 99.9% | Lab E | Apr 27, 2026 | verify |
| Tesamorelin | n/a | 99.5% | Lab E | Apr 27, 2026 | verify |
| Tesamorelin | n/a | 99.9% | Lab E | Mar 11, 2026 | verify |
| Retatrutide | n/a | 99.9% | Lab E | Mar 11, 2026 | verify |
| BPC-157 | n/a | 99.9% | Lab E | Mar 9, 2026 | verify |
| Retatrutide | n/a | 99.5% | Lab G | Feb 9, 2026 | verify |
| Tesamorelin | n/a | 99.67% | Lab E | Jan 8, 2026 | verify |
| Retatrutide | n/a | 99.7% | Lab G | Dec 28, 2025 | verify |
| Tirzepatide | n/a | 99.8% | Lab G | Dec 28, 2025 | verify |
| BPC-157 | n/a | 99.72% | Lab E | Dec 22, 2025 | verify |
| Tirzepatide | n/a | 99.95% | Lab E | Nov 24, 2025 | verify |
| Retatrutide | n/a | 99.95% | Lab E | Nov 24, 2025 | verify |
| BPC-157 | n/a | n/a | Lab E | Nov 24, 2025 | verify |
| BPC-157 | n/a | 99.8% | Lab G | Nov 21, 2025 | verify |
| Tesamorelin | n/a | 91.7% | Lab E | Oct 8, 2025 | verify |
| Retatrutide | n/a | 99.95% | Lab E | Sep 17, 2025 | verify |
| Retatrutide | n/a | 99.68% | Lab E | Sep 14, 2025 | verify |
| BPC-157 | n/a | 99.87% | Lab E | Sep 9, 2025 | verify |
| Tesamorelin | n/a | 99.39% | Lab F | Aug 31, 2025 | verify |
| Retatrutide | n/a | 99.93% | Lab E | Aug 20, 2025 | verify |
| Tirzepatide | n/a | 98.63% | Lab A | Jul 27, 2025 | verify |
Showing 22 most recent of 22. Search the full database on the CoA page.
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<a href="https://ascendpeptide.org/coa/vendor/yb-peptide/" rel="noopener"> <img src="https://ascendpeptide.org/coa/badge/yb-peptide.svg" alt="YB Peptide: lab tested, 22 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.