Dutch Peptides · independent lab results
Lab results for every batch.
Every batch is tested by Janoshik, an independent lab. They measure purity, endotoxins and heavy metals. The batch code is on the vial, so you can check each certificate yourself. Failed tests stay visible too.
- Tested by a third-party lab
- Batch code on every vial
- Failed results stay visible
Get an email when a new batch passes testing
One email per new batch, with the certificate attached. Nothing else.
Latest results
All lab results and certificates9Batches tested
78%Passed
99.72%Average purity
5Products tested
| Product | Batch | Tested | Purity | Endotoxins | Heavy metals | Result | Certificates |
|---|---|---|---|---|---|---|---|
| Retatrutide | RT5-0430 | 5 August 2026 | 99.735% | <1 EU/vial | Pass | Pass | PurityEndotoxinMetals |
| Tirzepatide | TR20-0428 | 27 July 2026 | 99.733% | 0.025 EU/mg | Pass | Pass | PurityEndotoxinMetals |
| Retatrutide | RT20-0428 | 22 July 2026 | 99.686% | 0.065 EU/mg | Pass | Pass | PurityEndotoxinMetals |
| BPC-157 | BC10-0429 | 13 July 2026 | 97.991% | 0.471 EU/mg | Pass | Fail | PurityEndotoxinMetals |
| GHK-CU | CU50-0429 | 13 July 2026 | 99.906% | 0.051 EU/mg | Pass | Pass | PurityEndotoxinMetals |
| Bacteriostatic Water 0.9% | BA10-0429 | 10 July 2026 | – | 3.184 EU/mL | Pass | Pass | BAC contentEndotoxinMetals |
| Tirzepatide | TR10-0428 | 8 July 2026 | 99.601% | 0.159 EU/mg | Pass | Pass | PurityEndotoxinMetals |
| Retatrutide | RT10-0428 | 8 July 2026 | 99.677% | <0.5 EU/mg | Pass | Pass | PurityEndotoxinMetals |
| Tirzepatide | DP-TR-0426 | 28 May 2026 | 99.879% | 3.589 EU/mg | Pass | Fail | PurityEndotoxinMetals |
How to verify a vial
- 1Find the batch code on the label of the vial.
- 2Look that code up in the table above.
- 3Open the certificate and check that the batch code matches.
Dutch Peptides
Every batch above comes from Dutch Peptides, with the same batch code on the vial.