
WllyBIO
Retatrutide
Finnrick tested 13 samples of Retatrutide (GLP-1, GIP, and GCGR agonist) from WllyBIO between 3 Jul 2025 and 15 Jun 2026. Test scores average over 4, no score below 3, and at least 6 tests warrant a confident Finnrick Rating of D (Poor).
Finnrick Rating™
WllyBIO
Retatrutide
Tested 13 Samples
Last test 15 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 Retatrutide tests from top-rated vendors:
All Retatrutide tests from WllyBIO
Samples are tested in commercial labs
Tests Count
13
Scores
AVGMINMAX
Last
15 Jun 2026
First
3 Jul 2025
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 15 Jun 2026 | View | 10mg | 9.44mg | -5.6% | 99.90% | below LOQ | (no batch ID) | No label / Silver crimp / Black cap | Lab E | Public | |
| 6 Jun 2026 | View | 20mg | 20.2mg | +1.0% | 99.70% | n/a | March 26, 2026 | White label / Silver crimp / Blue cap | Lab G | Public | |
| 6 Jun 2026 | View | 20mg | 17.3mg | -13.5% | 99.80% | n/a | Pink Pull Off Top | White label / Silver crimp / Pink cap | Lab G | Public | |
| 29 Dec 2025 | View | 10mg | 10.6mg | +6.0% | 99.90% | n/a | (no batch ID) | White Label / Silver Crimp / Clear Blue Cap | Lab E | Public | |
| 4 Nov 2025 | View | 15mg | 16.1mg | +7.3% | 99.70% | n/a | (no batch ID) | No Label / Copper Crimp / Clear Cap | Lab G | Public | |
| 30 Oct 2025 | View | 20mg | 22.5mg | +12.5% | 99.60% | n/a | (no batch ID) | No Label / Copper Crimp / Clear Cap | Lab G | Public | |
| 17 Oct 2025 | View | 50mg | 61.7mg | +23.4% | 99.95% | n/a | (no batch ID) | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 17 Oct 2025 | View | 20mg | 17.2mg | -14.0% | 99.77% | n/a | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | |
| 30 Sep 2025 | View | 5mg | 4.73mg | -5.4% | 99.85% | n/a | (no batch ID) | (no data) | Lab E | Public | |
| 18 Sep 2025 | View | 10mg | 9.63mg | -3.7% | 99.89% | n/a | (no batch ID) | No Label / Silver Crimp / Green Cap | Lab E | Public | |
| 31 Aug 2025 | View | 10mg | 9.66mg | -3.4% | 99.90% | n/a | (no batch ID) | White Label / Silver Crimp / Green Cap | Lab E | Public | |
| 21 Aug 2025 | View | 10mg | 10.5mg | +5.0% | 99.94% | n/a | (no batch ID) | No Label / Silver Crimp / Green Cap | Lab E | Public | |
| 3 Jul 2025 | View | 5mg | 3.96mg | -20.8% | 99.31% | n/a | (no batch ID) | White Label / Silver Crimp / Blue Cap | Lab E | Public | |