Testing records
P21 COAs
A COA shows the batch it names, not the lot shipped today. Vendors post certificates for specific batches; none of them shows which lot a vendor ships now, and a missing COA is shown as missing.
6 tracked offers for P21 from 6 vendors: 5 have a public COA for the exact product and strength, 1 of them confirmed at the lab; 1 does not. The newest test date on file is Sep 4, 2026. Labs named: Freedom Diagnostics, Janoshik Analytical, MDx BioAnalytical Laboratory, Vanguard Laboratory.
By product and vendor
Each row is one vendor's offer for one exact product. It shows the report behind the testing state: for a lab-verified product the newest report the lab confirmed, otherwise the newest report on file. A lab link appears only where the lab confirmed the report. Every archived report is stored with its SHA-256 hash.
| Vendor | Testing state | Lab | Tested | Purity | Batch |
|---|---|---|---|---|---|
| P21 5 mg vial2 vendors | |||||
| Core Peptides | Product COA on file2 more reports on file | Vanguard Laboratory | Jul 15, 2026 | 98.32% | C73684 |
| RUO | Vendor tests other products | – | – | – | – |
| P21 10 mg vial4 vendors | |||||
| Paramount Peptides | Lab-verified COA | Janoshik AnalyticalLab copy ↗ | Sep 10, 2024 | 99.52% | P2124-05-001 |
| Rescue Research | Product COA on file | Freedom Diagnostics | Sep 4, 2026 | 99.08% | RR-P21-2608 |
| Bulk Peptide Supply | Product COA on file1 more report on file | MDx BioAnalytical Laboratory | Jun 27, 2026 | 99.77% | P100130 |
| Simple Peptide | Product COA on file | Freedom Diagnostics | Feb 25, 2026 | 99.505% | P21-02232026-J |
What each testing state means
- Lab-verified COA (1): the lab's own portal or lookup confirms the report.
- Product COA on file (4): a public COA names this product and strength; it is not confirmed at the lab.
- Vendor tests other products (1): the vendor publishes COAs, none matched to this product.
Picks need a COA for the exact product and strength tested within 12 months; see the methodology.