Marvel Pep
Retatrutide
Finnrick tested 16 samples of Retatrutide (GLP-1, GIP, and GCGR agonist) from Marvel Pep between 16 Dec 2025 and 9 Aug 2026. Test scores average over 6, no score below 5, and at least 6 tests warrant a confident Finnrick Rating of B (Good).
Finnrick Rating™
Marvel Pep
Retatrutide
Tested 16 Samples
Last test 9 Aug 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 Marvel Pep
Samples are tested in commercial labs
Tests Count
16
Scores
AVGMINMAX
Last
9 Aug 2026
First
16 Dec 2025
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 9 Aug 2026 | View | 10mg | 10.2mg | +2.0% | 99.70% | n/a | 260139 | White label / Silver crimp / White cap | Lab G | Public | |
| 9 Aug 2026 | View | 10mg | 9.5mg | -5.0% | 99.60% | n/a | April 19, 2026 | No label / Gold crimp / Clear cap | Lab G | Public | |
| 6 Aug 2026 | View | Endotoxins | 10mg | n/a | n/a | n/a | low | April 19, 2026 | No label / Gold crimp / Clear cap | Lab G | Public |
| 3 Aug 2026 | View | 40mg | 34mg | -15.0% | 99.90% | n/a | March 7, 2026 | White label / Blue crimp / Clear cap | Lab E | Public | |
| 30 Jul 2026 | View | 20mg | 21.2mg | +6.0% | 99.80% | n/a | 258014 | No Label / Silver Crimp / White Cap | Lab G | Public | |
| 13 Jul 2026 | View | 10mg | 10.8mg | +8.0% | 99.20% | below LOQ | (no batch ID) | No label / Copper crimp / Clear cap | Lab E | Public | |
| 8 Jun 2026 | View | 30mg | 30.4mg | +1.3% | 99.80% | n/a | March 6, 2026 | No label / Silver crimp / Blue cap | Lab G | Public | |
| 2 Jun 2026 | View | 10mg | 9.79mg | -2.1% | 99.90% | below LOQ | 258013 | No label / Silver crimp / White cap | Lab E | Public | |
| 2 Apr 2026 | View | 20mg | 20.4mg | +2.0% | 99.60% | n/a | feb 5, 2026 | Gray Label / Copper Crimp / Clear Cap | Lab G | Public | |
| 7 Mar 2026 | View | 20mg | 21.7mg | +8.5% | 99.80% | n/a | 021526 | No Label / Silver Crimp / Clear Green Cap | Lab G | Public | |
| 18 Feb 2026 | View | 20mg | 17.6mg | -12.0% | 99.90% | n/a | (no batch ID) | No Label / Gold Crimp / Clear Cap | Lab E | Public | |
| 11 Feb 2026 | View | 10mg | 10.6mg | +6.0% | 99.90% | n/a | Marv2510220131 | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 4 Feb 2026 | View | 20mg | 20.2mg | +1.0% | 99.70% | n/a | Tr20-111 | No Label / Copper Crimp / Clear Cap | Lab G | Public | |
| 26 Jan 2026 | View | 30mg | 28mg | -6.7% | 99.80% | n/a | (no batch ID) | No Label / Silver Crimp / Clear Blue Cap | Lab G | Public | |
| 26 Jan 2026 | View | 20mg | 20.4mg | +2.0% | 99.70% | n/a | (no batch ID) | No Label / Gold Crimp / Clear Cap | Lab E | Public | |
| 23 Dec 2025 | View | 10mg | 10.8mg | +8.0% | 99.83% | not detected | Nov 2, 2025 | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 16 Dec 2025 | View | 10mg | 9.8mg | -2.0% | 99.70% | n/a | (no batch ID) | (no data) | Lab G | Public | |