Melanotan II COA — Verified Certificate of Analysis Results
266 independent third-party certificates of analysis for Melanotan II, from 5 labs across 112 vendors (2022-08-12 to 2026-06-15).
Every Melanotan II certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 266 published Melanotan II certs in our corpus.
266
Certificates
5
Independent labs
99.7%
Median tested purity
53%
Within 10% of label dose
↑ 32%
Overdosed (≥ +7% vs label)
↓ 28%
Underdosed (≤ −7% vs label)
4 of these Melanotan II certificates reported 0% of the labeled compound — a "sample does not contain" result. Always read the individual cert.
Verified Melanotan II certificates of analysis
| Vendor | Purity | Dose vs label | Lab | Tested | |
|---|---|---|---|---|---|
| Reta Peptide | 99.8% | -5.1% | LabE | 2026-06-15 | View COA → |
| Qihang Peptide | 99.257% | +2.2% | Janoshik | 2026-06-15 | View COA → |
| Wuhan Wansheng Biotechnology | 99.9% | +1.0% | LabE | 2026-06-12 | View COA → |
| Reta Peptide | 99.6% | +4.0% | LabE | 2026-06-04 | View COA → |
| Chameleon Peptides | 99.782% | -1.7% | Janoshik | 2026-06-01 | View COA → |
| Shanghai Erp Peptide Biotechnology | 99.8% | +2.0% | LabG | 2026-05-25 | View COA → |
| Shanghai Erp Peptide Biotechnology | 99.8% | +6.0% | LabG | 2026-05-25 | View COA → |
| Peptides For Sale | 97.6% | -59.7% | LabE | 2026-05-13 | View COA → |
| Nuscience Peptides | 99.9% | +19.0% | LabG | 2026-05-08 | View COA → |
| Injectify | 99.9% | +1.0% | LabG | 2026-05-08 | View COA → |
| Shanghai Erp Peptide Biotechnology | 0.0% | -100.0% | LabG | 2026-04-30 | View COA → |
| Shanghai Erp Peptide Biotechnology | 99.8% | +18.0% | LabG | 2026-04-30 | View COA → |
| Hk Peptides | 99.9% | -11.9% | LabE | 2026-04-28 | View COA → |
| Walker Chemicals (WKC) | 99.358% | +3.7% | Janoshik | 2026-04-20 | View COA → |
| (unknown) | 99.926% | — | Janoshik | 2026-04-13 | View COA → |
| DSF IR | 99.926% | +13.1% | Janoshik | 2026-04-13 | View COA → |
| MKM Peptides | 99.015% | +13.0% | Janoshik | 2026-04-09 | View COA → |
| Uther Peptide | 99.888% | +16.6% | Janoshik | 2026-04-09 | View COA → |
| thelobster | 99.75% | — | Janoshik | 2026-04-07 | View COA → |
| Oasis Peptides | 99.9% | +15.2% | LabG | 2026-03-25 | View COA → |
| Homopeptide | 99.925% | — | Janoshik | 2026-03-23 | View COA → |
| Hk Peptides | 99.739% | +16.1% | Janoshik | 2026-03-16 | View COA → |
| Qing Li Peptide | 99.8% | +3.0% | LabG | 2026-03-13 | View COA → |
| Lilipeptide | 0.0% | -100.0% | LabE | 2026-03-06 | View COA → |
| Chameleon Peptides LLC | 99.868% | +5.4% | Janoshik | 2026-03-06 | View COA → |
| Panda Peptides LLC | 99.868% | +5.4% | Janoshik | 2026-03-06 | View COA → |
| Hk Peptides | 99.19% | +3.0% | LabE | 2026-02-26 | View COA → |
| EZP | 99.894% | +2.3% | Janoshik | 2026-02-25 | View COA → |
| AMP | 99.894% | +2.3% | Janoshik | 2026-02-25 | View COA → |
| Phoenix Biolabs | 99.955% | — | Janoshik | 2026-02-20 | View COA → |
| Guangzhou Jeep Biotechnology Jeep | 99.873% | +9.1% | Janoshik | 2026-02-17 | View COA → |
| Hk Peptides | 99.8% | +9.0% | LabG | 2026-02-15 | View COA → |
| PeptiLab | 99.84% | +14.2% | Janoshik | 2026-02-09 | View COA → |
| Qing Li Peptide | 99.9% | -2.5% | LabE | 2026-02-09 | View COA → |
| Bulk Peptide Wholesale | 99.9% | +1.0% | LabE | 2026-02-06 | View COA → |
| Bulk Peptide Wholesale | 99.87% | +2.0% | LabE | 2026-02-06 | View COA → |
| Xcel Peptides | 99.908% | +19.4% | Janoshik | 2026-02-04 | View COA → |
| HM PEPTIDE | 99.849% | +7.7% | Unknown | 2026-02-03 | View COA → |
| Volk | 99.631% | — | Janoshik | 2026-01-28 | View COA → |
| Modern Research LLC | 99.762% | — | Janoshik | 2026-01-26 | View COA → |
| Qing Li Peptide | 99.9% | -63.2% | LabE | 2026-01-26 | View COA → |
| Hk Peptides | 99.9% | +3.0% | LabE | 2026-01-26 | View COA → |
| Lilipeptide | 98.81% | +0.0% | LabE | 2026-01-19 | View COA → |
| Lilipeptide | 99.67% | -0.4% | LabE | 2026-01-19 | View COA → |
| Qing Li Peptide | 99.54% | +8.0% | LabE | 2026-01-15 | View COA → |
| Beibangan | 99.093% | — | Janoshik | 2026-01-05 | View COA → |
| Velora Research | 99.832% | +2.1% | Janoshik | 2026-01-05 | View COA → |
| Prizm Peptides | 99.632% | — | Janoshik | 2025-12-15 | View COA → |
| Reta Peptide | 99.56% | +4.0% | LabE | 2025-12-06 | View COA → |
| Hk Peptides | 99.77% | +7.0% | LabE | 2025-12-06 | View COA → |
| Peptide Dynamics | 99.755% | +9.7% | Janoshik | 2025-11-26 | View COA → |
| Lilipeptide | 98.78% | +7.0% | LabE | 2025-11-25 | View COA → |
| Hk Peptides | 99.22% | -2.3% | LabE | 2025-11-25 | View COA → |
| www.innopeptide.com | 99.476% | +12.1% | Janoshik | 2025-11-24 | View COA → |
| EZP | 99.734% | +13.0% | Janoshik | 2025-11-19 | View COA → |
| Peptide Powerhouse | 99.837% | +26.3% | Janoshik | 2025-11-14 | View COA → |
| Peptide Powerhouse | 99.723% | -0.9% | Janoshik | 2025-11-14 | View COA → |
| Transforma Peptides | 99.837% | +26.3% | Janoshik | 2025-11-14 | View COA → |
| Cocer Peptides | 99.74% | +29.7% | Janoshik | 2025-11-12 | View COA → |
| Guangzhou Jeep Biotechnology Jeep | 99.495% | +19.0% | Janoshik | 2025-11-11 | View COA → |
Showing the 60 most recent of 266 Melanotan II certificates.