Peptide Partners
Tirzepatide
Finnrick tested 6 samples of Tirzepatide (GLP-1 and GIP agonist) from Peptide Partners between 11 Jun 2025 and 3 Oct 2025. Test scores average over 5, no score below 4, and at least 6 tests warrant a confident Finnrick Rating of C (Okay).
Take Action
Request Full Data Access to the Finnrick database of peptide tests.
Free peptide testing
Mail in a sample (US only) to get confidence for the specific vials you have, and contribute to identifying unsafe supply chains, so other people can avoid risky and costly mistakes.
Other Tirzepatide tests from top-rated vendors:
All Tirzepatide tests from Peptide Partners
Samples are tested in commercial labs
Tests Count
Scores
Last
First
| Quantity | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 3 Oct 2025 | View | 40mg | 36.900mg | -7.8% | 99.83% | TZ20250730 | White Label / Silver Crimp / Black Cap | Lab E | Public | |
| 3 Oct 2025 | View | 40mg | 38.000mg | -5.0% | 99.83% | TZ20250730 | White Label / Silver Crimp / Black Cap | Lab E | Public | |
| 3 Oct 2025 | View | 40mg | 36.300mg | -9.3% | 99.87% | TZ20250730 | White Label / Silver Crimp / Black Cap | Lab E | Public | |
| 29 Sep 2025 | View | Endotoxins | 40mg | Endotoxins not detected | TZ20250730 | No Label / Silver Crimp / Brown Cap | Lab B | Vendor | ||
| 9 Sep 2025 | View | 40mg | 40.320mg | +0.8% | 99.52% | TZ20250730 | No Label / Silver Crimp / BrownCap | Lab B | Vendor | |
| 9 Sep 2025 | View | 40mg | 42.150mg | +5.4% | 99.46% | TZ20250730 | No Label / Silver Crimp / Brown Cap | Lab B | Vendor | |
| 11 Jun 2025 | View | 30mg | 19.900mg | -33.7% | 99.65% | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | |
Launch with Finnrick
Some of the samples listed on this page were submitted by their vendor, as part of the Launch with Finnrick vendor support program.
The program is designed to help vendors get listed on the Finnrick web site while protecting the integrity of our rating system.
The vendor submitted four samples per product, two of which were tested by Finnrick for identity, purity and quantity according to our usual process. The vials were anonymized before being sent to the testing lab.