
GrayPep
Tirzepatide
Finnrick tested 4 samples of Tirzepatide (GLP-1 and GIP agonist) from GrayPep between 3 Mar 2026 and 11 May 2026. Test scores average over 7, no score below 6, and at least 2 tests warrant a tentative Finnrick Rating of A (Great).
Finnrick Rating™
Tentative Rating
GrayPep
Tirzepatide
Tested 4 Samples
Last test 11 May 2026
Take Action
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 GrayPep
Samples are tested in commercial labs
Tests Count
4
Scores
AVGMINMAX
Last
11 May 2026
First
3 Mar 2026
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 11 May 2026 | View | 60mg | 60.6mg | +1.0% | 99.90% | low | (no batch ID) | No Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 20 Mar 2026 | View | 30mg | 27.6mg | -8.0% | 99.80% | n/a | Nov 2 2025 | No Label / Silver Crimp / Black Cap | Lab G | Public | |
| 5 Mar 2026 | View | 20mg | 17.1mg | -14.5% | 99.90% | below LOQ | 202512 | No Label / Silver Crimp / Green Cap | Lab E | Public | |
| 3 Mar 2026 | View | 20mg | 18.2mg | -9.0% | 99.90% | n/a | 202512 | No Label / Silver Crimp / Green Cap | Lab E | Public | |