
YB Peptide
Tirzepatide
Finnrick tested 4 samples of Tirzepatide (GLP-1 and GIP agonist) from YB Peptide between 28 Jul 2025 and 1 Jun 2026. Test scores average over 4, no score below 3, and at least 2 tests warrant a tentative Finnrick Rating of D (Poor).
Finnrick Rating™
Tentative Rating
YB Peptide
Tirzepatide
Tested 4 Samples
Last test 1 Jun 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 YB Peptide
Samples are tested in commercial labs
Tests Count
4
Scores
AVGMINMAX
Last
1 Jun 2026
First
28 Jul 2025
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 1 Jun 2026 | View | 30mg | 36.1mg | +20.3% | 99.60% | below LOQ | TZ05260026 | White label / Copper crimp / Clear cap | Lab E | Public | |
| 29 Dec 2025 | View | 20mg | 27.4mg | +37.0% | 99.80% | n/a | 12032025TR20 | White Label / Silver Crimp / Gray Cap | Lab G | Public | |
| 25 Nov 2025 | View | 9.89mg | 8.49mg | -14.2% | 99.95% | n/a | (no batch ID) | No Label / Silver Crimp / Clear Green Cap | Lab E | Public | |
| 28 Jul 2025 | View | 15mg | 16.69mg | +11.3% | 98.63% | n/a | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab A | Public | |