Mesterolone COA — Verified Certificate of Analysis Results
40 independent third-party certificates of analysis for Mesterolone, from 1 labs across 25 vendors (2019-10-27 to 2026-05-06).
Every Mesterolone certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 40 published Mesterolone certs in our corpus.
40
Certificates
1
Independent labs
98.0%
Median tested purity
73%
Within 10% of label dose
↑ 19%
Overdosed (≥ +7% vs label)
↓ 19%
Underdosed (≤ −7% vs label)
Verified Mesterolone certificates of analysis
| Vendor | Purity | Dose vs label | Lab | Tested | |
|---|---|---|---|---|---|
| usroids.com | — | +1.1% | Janoshik | 2026-05-06 | View COA → |
| Info Venomlab | 98.0% | — | Janoshik | 2026-02-18 | View COA → |
| — | 98.0% | — | Janoshik | 2026-01-26 | View COA → |
| INTEX PHARMA | — | +17.8% | Janoshik | 2025-08-28 | View COA → |
| INTEX PHARMA | — | +0.0% | Janoshik | 2025-08-28 | View COA → |
| Unique Pharmaceutical | — | +3.4% | Janoshik | 2025-07-18 | View COA → |
| RoidTeam.net | — | +0.5% | Janoshik | 2025-07-07 | View COA → |
| GENLABS | — | +5.4% | Janoshik | 2025-06-04 | View COA → |
| Unique Pharmaceutical | — | -7.1% | Janoshik | 2025-05-02 | View COA → |
| Hilma Biocare | — | +1.1% | Janoshik | 2025-03-28 | View COA → |
| Prime Pharmaceuticals | — | +11.8% | Janoshik | 2025-03-13 | View COA → |
| F40 Biotech | — | +3.4% | Janoshik | 2025-01-07 | View COA → |
| pure-platinum.com | — | +3.7% | Janoshik | 2024-12-04 | View COA → |
| ASTERA LABS | — | +1.3% | Janoshik | 2024-10-10 | View COA → |
| Generopharm - Kits4Less.com | — | +7.8% | Janoshik | 2024-08-13 | View COA → |
| GENLABS | — | -31.8% | Janoshik | 2024-06-21 | View COA → |
| Shanghai Sigma Audley Ssa | — | +12.7% | Janoshik | 2024-06-05 | View COA → |
| PHARMAQO | — | +11.4% | Janoshik | 2024-05-02 | View COA → |
| Unique Pharmaceutical | — | -21.0% | Janoshik | 2024-03-08 | View COA → |
| 808labs | — | -2.6% | Janoshik | 2024-02-21 | View COA → |
| PHARMAQO | — | +19.8% | Janoshik | 2024-02-01 | View COA → |
| Godbullraw | 98.0% | — | Janoshik | 2024-01-26 | View COA → |
| UGL OZ | — | -10.8% | Janoshik | 2023-09-26 | View COA → |
| Optitropin EU | — | +15.5% | Janoshik | 2023-05-15 | View COA → |
| Prime Pharmaceuticals | — | -0.2% | Janoshik | 2023-03-04 | View COA → |
| Beligas pharmacy | — | +3.5% | Janoshik | 2023-01-04 | View COA → |
| (unknown) | — | +3.5% | Janoshik | 2022-12-31 | View COA → |
| INTEX PHARMA | — | +3.5% | Janoshik | 2022-12-31 | View COA → |
| PARA PHARMA | — | -10.0% | Janoshik | 2022-11-26 | View COA → |
| (unknown) | — | +0.0% | Janoshik | 2022-11-08 | View COA → |
| (unknown) | — | +0.0% | Janoshik | 2022-11-08 | View COA → |
| Ultima Pharmaceuticals | — | +0.0% | Janoshik | 2022-06-03 | View COA → |
| onlythebestaas.com | — | -1.6% | Janoshik | 2022-01-21 | View COA → |
| (unknown) | — | +0.0% | Janoshik | 2021-07-02 | View COA → |
| (unknown) | — | +0.0% | Janoshik | 2021-07-02 | View COA → |
| onlythebestaas.com | — | -12.9% | Janoshik | 2021-04-15 | View COA → |
| PHARMAQO | — | +0.0% | Janoshik | 2021-03-16 | View COA → |
| PARA PHARMA | — | -7.8% | Janoshik | 2021-01-08 | View COA → |
| SunrisePharma | — | +0.0% | Janoshik | 2020-10-17 | View COA → |
| JuicePal | — | -2.1% | Janoshik | 2019-10-27 | View COA → |