P-21 COA — Verified Certificate of Analysis Results
8 independent third-party certificates of analysis for P-21, from 3 labs across 5 vendors (2024-08-28 to 2026-05-11).
Every P-21 certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 8 published P-21 certs in our corpus.
8
Certificates
3
Independent labs
99.2%
Median tested purity
14%
Within 10% of label dose
↑ 71%
Overdosed (≥ +7% vs label)
↓ 14%
Underdosed (≤ −7% vs label)
Verified P-21 certificates of analysis
| Vendor | Purity | Dose vs label | Lab | Tested | |
|---|---|---|---|---|---|
| Unknown vendor (review) | 98.0% | +29.1% | Freedom Diagnostics | 2026-05-11 | View COA → |
| Uther Thailand | 99.437% | +21.3% | Janoshik | 2026-02-11 | View COA → |
| Qingdao Sigma Chemical | 99.159% | — | Janoshik | 2026-01-19 | View COA → |
| Qingdao Sigma Chemical | 99.159% | +25.9% | Janoshik | 2026-01-19 | View COA → |
| Verified Peptides | 99.447% | +0.0% | Janoshik | 2025-10-27 | View COA → |
| Qingdao Sigma Chemical | 99.809% | +26.0% | Janoshik | 2024-10-10 | View COA → |
| Qingdao Sigma Chemical | 97.676% | +18.6% | Janoshik | 2024-09-03 | View COA → |
| PTDS | — | -100.0% | Janoshik | 2024-08-28 | View COA → |