Letrozole COA — Verified Certificate of Analysis Results
21 independent third-party certificates of analysis for Letrozole, from 1 labs across 15 vendors (2019-08-13 to 2025-07-07).
Every Letrozole certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 21 published Letrozole certs in our corpus.
21
Certificates
1
Independent labs
96.0%
Median tested purity
80%
Within 10% of label dose
↑ 35%
Overdosed (≥ +7% vs label)
↓ 10%
Underdosed (≤ −7% vs label)
Verified Letrozole certificates of analysis
| Vendor | Purity | Dose vs label | Lab | Tested | |
|---|---|---|---|---|---|
| RoidTeam.net | — | +9.6% | Janoshik | 2025-07-07 | View COA → |
| Matrix Laboratories | — | -5.6% | Janoshik | 2025-04-01 | View COA → |
| ASTERA LABS | — | -1.0% | Janoshik | 2024-10-10 | View COA → |
| Zydus Lifesciences Limited | — | -2.0% | Janoshik | 2024-08-14 | View COA → |
| Arailpharma | — | +19.2% | Janoshik | 2024-07-04 | View COA → |
| Hilma Biocare | — | -89.7% | Janoshik | 2024-06-03 | View COA → |
| PHARMAQO | — | +26.0% | Janoshik | 2024-02-01 | View COA → |
| PHARMAQO | — | -8.0% | Janoshik | 2024-02-01 | View COA → |
| OxygenPharm | — | +4.8% | Janoshik | 2024-01-02 | View COA → |
| BrainLabz.ru | 96.0% | — | Janoshik | 2023-08-31 | View COA → |
| DEUS MEDICAL | — | -0.8% | Janoshik | 2023-05-29 | View COA → |
| Optitropin EU | — | +10.4% | Janoshik | 2023-05-15 | View COA → |
| goldenlabs | — | +10.0% | Janoshik | 2023-03-24 | View COA → |
| (unknown) | — | +7.6% | Janoshik | 2023-03-14 | View COA → |
| Prime Pharmaceuticals | — | +6.4% | Janoshik | 2023-03-04 | View COA → |
| OxygenPharm | — | -3.2% | Janoshik | 2022-12-16 | View COA → |
| Optitropin EU | — | +7.2% | Janoshik | 2022-08-12 | View COA → |
| PHARMAQO | — | +4.0% | Janoshik | 2021-03-16 | View COA → |
| PARA PHARMA | — | +0.2% | Janoshik | 2021-02-08 | View COA → |
| PARA PHARMA | — | -2.2% | Janoshik | 2021-01-08 | View COA → |
| Hilma Biocare | — | +0.0% | Janoshik | 2019-08-13 | View COA → |