P21 (P021) lab tests
10 certificates of analysis for P21 (P021) are on file, from 7 shops and 5 labs. The latest was tested on .
These are certificates shops have chosen to publish, verified for authenticity before listing. Because shops decide which COAs to make public, the set reflects the batches they published rather than every production batch — a selection bias we state openly. What shop COAs show →
What the P21 (P021) record shows
P21 (P021)'s record holds 10 certificates from 7 shops, tested by 5 labs between October 2024 and June 2026. Reported HPLC purity ran from 99.00% to 99.82% (median 99.66%). Measured content ran from 97% to 126% of the label (median 104%). 5 of the 10 vials were labelled 10 mg. 3 certificates include an endotoxin result, and 1 was confirmed on the lab's own portal. Bioviridian ran 3 of the 10 tests.
Generated from the table below · updates with every new certificate
Every published P21 (P021) test
| Tested | Shop | Lab | Purity | Measured vs label | Endotoxin | Record |
|---|---|---|---|---|---|---|
| PeptuviaSupplier-provided | Janoshik Labs | 98.27% | 11.24 / 10 mg 112% of label | — | PSP2110-1✓ | |
| American Peptides | Bioviridian | 99.80% | 5.25 / 5 mg 105% of label | Pass | P21-5-0318 | |
| Pure Health Peptides | Ethos Analytics | 99.00% | 10.03 / 10 mg 100% of label | — | CHA-040126 | |
| American Peptides | Bioviridian | 99.60% | 5.42 / 5 mg 108% of label | Pass | P21-5-0318 | |
| Liberty Peptides | Bioviridian | 99.80% | 6.32 / 5 mg 126% of label | Pass | LPUS21005 | |
| Amino Tech | freedomdiagnosticstesting.com | 99.71% | 9.65 / 10 mg 97% of label | — | View record → | |
| Grey Market Peptide | freedomdiagnosticstesting.com | 99.71% | 9.65 / 10 mg 97% of label | — | View record → | |
| Pure Health Peptides | Ethos Analytics | 99.00% | 10.37 / 10 mg 104% of label | — | CHA-122025 | |
| Skye Peptides | Janoshik Labs | 99.82% | 12.42 / 10 mg 124% of label | — | P2125-10-001 | |
| Atomik Labz | Vanguard Laboratory | 99.17% | 11.96 / 12 mg 100% of label | — | M080525M | |
| Atomik Labz | Janoshik Labs | 99.45% | 12.44 / 12 mg 104% of label | — | MM1004 |
Measured amount in amber when it is under 90% or over 130% of the label; Check label when it is under 80% or over 150%. Records without a lot number link as View →.
Seven checks for any P21 (P021) certificate
- Batch-matched and independent. The certificate names the lot in your hands and comes from a lab the vendor neither owns nor pays.
- Purity against the range. Read the figure against what other certificates for this compound report. How to read HPLC and mass-spec results
- Mass-spec identity. Only mass spectrometry shows which molecule is in the vial.
- Net content, measured. Purity and quantity are separate questions. Why 10 mg isn't 10 mg
- Endotoxin on the batch. A missing line means not tested, not passed. Endotoxin testing and LAL interpretation
- A lab you can check. Named on the certificate, with a way to verify it. Testing labs we track · Red flags in a certificate of analysis
- What no test shows. A clean certificate says nothing about efficacy, dosing or long-term safety.
Related lab tests
More on P21 (P021)
Labs with P21 (P021) tests on file (5): Janoshik Labs, Bioviridian, Ethos Analytics, freedomdiagnosticstesting.com, Vanguard Laboratory